C Safvan's Publications List

Strong fields induce ultrafast rearrangement of H atoms in H2O

2009-08-07T03:51:40Z

H atoms in H2O are rearranged by strong optical fields generated by intense 9.3 fs laser pulses to form H. This atomic rearrangement is ultrafast: It occurs within a single laser pulse. Quantum-chemical calculations reveal that H originates in the 1A state of H2O2+ when the O–H bond elongates to 1.15 a.u. and the H–O–H angle becomes 120°. Bond formation on the ultrafast time scale of molecu...

F. A. Rajgara, A. K. Dharmadhikari, D. Mathur, and C. P. Safvan (2009) J. Chem. Phys 130: 23 231104

Dissociation of methanol by ion-impact: Breakup dynamics, bond rearrangement and kinetic energy release

2009-08-07T03:47:02Z

The dissociation dynamics of multiply charged methanol molecules formed in collision with 1.2 MeV Ar8+projectiles is studied. Using coincidence mapping techniques, we can separate out the different dissociation pathways between carbon, oxygen and hydrogen ionic fragments as well as two- and three-body breakup events. Reactions involving intramolecular bond rearrangements within the CH3 group of th...

Sankar De, A. Roy, Jyoti Rajput, P.N. Ghosh, C.P. Safvan (2008) International Journal of Mass Spectrometry 276: 1 43

Setup for in situ deep level transient spectroscopy of semiconductors during swift heavy ion irradiation

2009-08-07T03:53:39Z

A computerized system for in situ deep level characterization during irradiation in semiconductors has been set up and tested in the beam line for materials science studies of the 15 MV Pelletron accelerator at the Inter-University Accelerator Centre, New Delhi. This is a new facility for in situ irradiation-induced deep level studies, available in the beam line of an accelerator laboratory. It i...

Sandeep Kumar, Sugam Kumar, Y. S. Katharria, C. P. Safvan, D. Kanjilal (2008) Rev. Sci. Instrum 79: 056103

Ion-induced dissociation dynamics of acetylene

2009-08-07T03:52:17Z

We report on the results of dissociation dynamics of multiple charged acetylene molecules formed in collision with 1.2 MeV Ar8+ projectiles. Using the coincidence map, we can separate out the different dissociation pathways between carbon and hydrogen ionic fragments as well as complete two-body breakup events. From the measured slopes of the coincidence islands for carbon atomic fragments and the...

S De, J Rajput, A Roy, P N Ghosh, C P Safvan (2008) PHYSICAL REVIEW A 77: 2 022708

Projectile charge-state dependence of methane fragmentation

2009-08-07T03:52:58Z

The projectile charge-state dependence of methane fragmentation is studied at a constant projectile (Arq+, 1q7) velocity of 0.42 a.u. using the technique of time-of-flight mass spectroscopy. The relative cross sections for fragment production are reported as a function of the incident projectile charge state. The fragments appearing as molecular ions show a decrease in cross sections with increas...

Jyoti Rajput , C. P. Safvan (2008) Phys. Rev. A 77: 014702

Butterfly structure : Signature of vibrational flopping in dissociative acetylene

2008-12-03T13:56:05Z

Sankar De, Jyoti Rajput, A Roy, P N Ghosh, C P Safvan (2007) The Journal of Chemical Physics 127: 5

Kinetic energy distributions in ion-induced CO fragmentation : Signature of shallow states in multiply charged CO

2008-12-03T13:57:42Z

Jyoti Rajput, C P Safvan (2007) Physical Review A (Atomic, Molecular, and Optical Physics) 75: 6

Dissociation of Methanol and Acetylene by slow Highly Charged Ion Collision

2008-12-10T08:48:19Z

We report here the results of dissociation of multiple charged methanol and acetylene molecules in collision with 1.2 MeV Ar8+ projectiles. We observed a wide range of dissociation products from the TOF spectrum starting from undissociated molecular ions, fragments losing an hydrogen atom due to breakage of C-H and/or O-H bonds, to complete rupture of C-C and C-O skeletons for the respective molec...

Sankar De, Jyoti Rajput, A Roy, R Ahuja, P N Ghosh, C P Safvan (2007) Journal of Physics : Conference Series 80: 012005-7

A setup for probing ion-molecule collision dynamics

2008-12-03T14:03:26Z

S De, P N Ghosh, A Roy, C P Safvan (2006) Nuclear Instruments and Methods in Physics Research Section B : Beam Interactions with Materials and Atoms 243: 2 435-441

Kinetic energy distributions and signature of target excitation in N[sub 2] fragmentation on collisions with Ar[sup 9+] ions

2008-12-03T14:01:09Z

Jyoti Rajput, Sankar De, A Roy, C P Safvan (2006) Physical Review A (Atomic, Molecular, and Optical Physics) 74: 3

Formation of H[sub 3][sup +] due to Intramolecular Bond Rearrangement in Doubly Charged Methanol

2008-12-03T14:00:27Z

Sankar De, Jyoti Rajput, A Roy, P N Ghosh, C P Safvan (2006) Physical Review Letters 97: 21

Storage ring study of the dissociative recombination of He+2

2008-12-10T08:41:35Z

Absolute cross sections for dissociative recombination have been measured for the 4He+2 and 3He4He+ isotopomers as a function of storage time at the ASTRID storage ring. The recombination rate of 3He4He+ with low-energy electrons is found to dramatically decrease with time, giving an upper limit for the thermal rate coefficient for cold ions of the order of 6 $\times$ 10[?]10 cm3 s[?]1, in agreeme...

X Urbain, N Djuric, C P Safvan, M J Jensen, H B Pedersen, L Vejby Søgaard, L H Andersen (2005) Journal of Physics B : Atomic, Molecular and Optical Physics 38: 1 43-50

Hard X-ray generation from microdroplets in intense laser fields

2008-12-10T08:41:57Z

Microdroplets of 15-ÎŒm diameter are subjected to ultra-short laser pulses of intensities up to 1015Wcmâ2 to produce hot dense plasma. The hot electrons produced in the microdroplet plasma result in efficient generation of hard X-rays in the range 50â150keV at an irradiance as low as 8Ã1014Wcmâ2. The X-ray source efficiency is estimated to be about 2 Ã10â7%. A prepulse ...

M Anand, C P Safvan, M Krishnamurthy (2005) Applied Physics B: Lasers and Optics 81: 4 469-477

Radioactive ion beam acceleration at MAFF

2008-12-10T08:41:03Z

M Pasini, O Kester, D Habs, M Groß, T Sieber, H J Maier, W Assmann, R Krüken, T Faestermann, A Schempp, U Ratzinger, C P Safvan (2004) Nuclear Physics A 746: 397-400

A setup for probing collisions of highly charged ions with liquid droplets

2008-12-03T14:11:56Z

G K Padmashree, A Roy, D Kanjilal, G Rodrigues, R Ahuja, R Somashekar, C P Safvan (2004) Review of Scientific Instruments 75: 12 5094-5099

Dissociative recombination of dications

2008-12-03T14:15:42Z

K Seiersen, O Heber, M J Jensen, C P Safvan, L H Andersen (2003) The Journal of Chemical Physics 119: 2 839-843

Dissociative recombination of the cation and dication of $CO2$

2009-08-07T03:56:46Z

K Seiersen, A Al-Khalili, O Heber, M J Jensen, I B Nielsen, H B Pedersen, C P Safvan, L H Andersen (2003) Phys. Rev. A 68: 2

Absolute high-resolution rate coefficients for dissociative recombination of electrons with $HD+:$ Comparison of results from three heavy-ion storage rings

2009-08-07T03:55:58Z

A Al-Khalili, S Rosén, H Danared, A M Derkatch, A Källberg, M Larsson, A Le Padellec, A Neau, J Semaniak, R Thomas, M af Ugglas, L Vikor, W Zong, W J van der Zande, X Urbain, M J Jensen, R C Bilodeau, O Heber, H B Pedersen, C P Safvan, L H Andersen, M Lange, J Levin, G Gwinner, L Knoll, M Scheffel, D Schwalm (2003) Phys. Rev. A 68: 4

Lifetime of $1s2s2p 4P5/2o$ in $V2+$ using beam-foil techniques

2009-08-07T03:57:15Z

T Nandi, P Marketos, P Joshi, R P Singh, C P Safvan, P Verma, A Mandal, A Roy, R K Bhowmik (2002) Phys. Rev. A 66: 5

ECR ion source based low energy ion beam facility

2008-12-10T08:40:33Z

Abstract Mass analyzed highly charged ion beams of energy ranging from a few keV to a few MeV plays an important role in various aspects of research in modern physics. In this paper a unique low energy ion beam facility (LEIBF) set up at Nuclear Science Centre (NSC) for providing low and medium energy multiply charged ion beams ranging from a few keV to a few MeV for research in materia...

P Kumar, G Rodrigues, U Rao, C Safvan, D Kanjilal, A Roy (2002) Pramana 59: 5 805-809

Dissociative recombination and excitation of $H3+$

2009-08-07T04:05:42Z

M J Jensen, H B Pedersen, C P Safvan, K Seiersen, X Urbain, L H Andersen (2001) Phys. Rev. A 63: 5

Coulomb and centrifugal barrier bound dianion resonances of NO[sub 2]

2008-12-03T14:21:47Z

L H Andersen, R Bilodeau, M J Jensen, S B Nielsen, C P Safvan, K Seiersen (2001) The Journal of Chemical Physics 114: 1 147-151

Electron collisions with the diatomic fluorine anion

2009-08-07T03:57:43Z

H B Pedersen, R Bilodeau, M J Jensen, I V Makassiouk, C P Safvan, L H Andersen (2001) Phys. Rev. A 63: 3

Dissociative Recombination of H3O+, HD2O+, and D3O+

2008-12-03T14:23:21Z

ABSTRACT We present an experimental study of the dissociative recombination (DR) of H3O+ and its isotopomers D3O+ and HD2O+ performed at the ASTRID storage ring. DR cross sections have been measured as a function of energy, while complete branching ratios have been measured at $E=0$ . The H3O+ data yield an accurate determination of the branching ratio for water formation ( $0.25\pm 0.01$ ). The ...

M J Jensen, R C Bilodeau, C P Safvan, K Seiersen, L H Andersen, H B Pedersen, O Heber (2000) The Astrophysical Journal 543: 2 764-774

Alignment of neutral molecules by a strong laser field

2008-12-04T04:27:51Z

H Sakai, C P Safvan, J J Larsen, K M Hilligsoe, K Hald, H Stapelfeldt (1999 ) Quantum Electronics and Laser Science Conference, 1999. Technical Digest. Summaries of Papers Presented at the

Fast beam photofragment apparatus for studies of electronic and nuclear dynamics

2008-12-10T08:39:32Z

H B Pedersen, M J Jensen, C P Safvan, X Urbain, L H Andersen (1999) Review of Scientific Instruments 70: 8 3289-3298

Controlling the alignment of neutral molecules by a strong laser field

2008-12-10T08:39:10Z

Hirofumi Sakai, C P Safvan, Jakob Juul Larsen, Karen Marie Hilligsoe, Kasper Hald, Henrik Stapelfeldt (1999) The Journal of Chemical Physics 110: 21 10235-10238

Electron collisions with diatomic anions

2009-08-07T04:04:49Z

H B Pedersen, N Djuri\ifmmode \acutec\else ć\fi, M J Jensen, D Kella, C P Safvan, H T Schmidt, L Vejby-Christensen, L H Andersen (1999) Phys. Rev. A 60: 4 2882-2899

D22+ dication as a probe of spatial alignment of D2 molecules in intense laser light

2008-12-10T08:39:59Z

D Mathur, V R Bhardwaj, C P Safvan, F A Rajgara (1999) International Journal of Mass Spectrometry 192: 1-3 367-377

EXPERIMENTAL TEST OF A QUANTUM-LIKE THEORY: MOTION OF ELECTRONS IN A UNIFORM MAGNETIC FIELD, IN A VARIABLE POTENTIAL WELL

2009-08-07T04:04:03Z

We describe an experiment to test a quantum-like theory which predicts quantum-like behavior for an ensemble of electrons in a classical configuration with static magnetic and electric fields. Some of the earlier experiments had supporting evidence for anomalous, quantum-like effects in such a situation showing systematic modulations of electron current when a retarding potential is varied, even t...

C. S. Unnikrishnan, C.P. Safvan (1999) Modern Physics Letters A (MPLA) 14 : 7 479 - 490

Aligning molecules with intense nonresonant laser fields

2008-12-03T14:35:33Z

Jakob Juul Larsen, Hirofumi Sakai, C P Safvan, Ida Wendt-Larsen, Henrik Stapelfeldt (1999) The Journal of Chemical Physics 111: 17 7774-7781

Dissociative recombination of the $CO2+$ dication

2009-08-07T03:58:10Z

C P Safvan, M J Jensen, H B Pedersen, L H Andersen (1999) Phys. Rev. A 60: 5

Dissociative recombination and excitation of $H2O+$ and $HDO+$

2009-08-07T04:05:14Z

M J Jensen, R C Bilodeau, O Heber, H B Pedersen, C P Safvan, X Urbain, D Zajfman, L H Andersen (1999) Phys. Rev. A 60: 4 2970-2976

Doubly Charged Negative Ions of $B2$ and $C2$

2009-08-07T04:03:17Z

H B Pedersen, N Djuri\ifmmode \acutec\else ć\fi, M J Jensen, D Kella, C P Safvan, L Vejby-Christensen, L H Andersen (1998) Phys. Rev. Lett. 81: 24 5302-5305

Collision-induced dissociation of $CO2 +$ ions

2009-08-07T04:02:51Z

V R Bhardwaj, D Mathur, K Vijayalakshmi, P Hvelplund, M O Larsson, C P Safvan (1998) Phys. Rev. A 58: 4 2834-2843

Spatial alignment of molecules by intense, linearly-polarized light fields and the effects of space charge

2008-12-10T08:38:23Z

C P Safvan, R V Thomas, D Mathur (1998) Chemical Physics Letters 286: 3-4 329-335

Distortion of molecular electron density distributions by an intense laser field : dissociative ionization of

2009-08-07T04:02:15Z

The interaction of a tetrahedral molecule (carbon tetrachloride) with intense, 532 nm, 35 ps, linearly polarized, laser fields is explored theoretically and experimentally. Distortions caused by the laser field in the molecular electron density distributions are computed in an approximate fashion using quantum-chemical techniques. A comparative experimental study is performed of the dissociative i...

K Vijayalakshmi, V R Bhardwaj, C P Safvan, D Mathur (1997) Journal of Physics B: Atomic, Molecular and Optical Physics 30: 10 L339-L347

On the ionization and dissociation of NO2 by short intense laser pulses

2008-12-10T08:36:37Z

K Vijayalakshmi, C P Safavan, G Ravindra Kumar, D Mathur (1997) Chemical Physics Letters 270: 1-2 37-44

On the spatial alignment of bent triatomic molecules by intense, picosecond laser fields

2008-12-10T08:37:02Z

Angular distributions have been measured of the products of dissociative ionization (DI) of the bent triatomic molecules , and induced by intense ( W ), linearly polarized electric fields generated using 35 ps long laser pulses at a wavelength of 532 nm. Both the and fragments produced upon DI of possess isotropic angular distributions. and fragments from DI of are formed with very marked anisotro...

V R Bhardwaj, C P Safvan, K Vijayalakshmi, D Mathur (1997) Journal of Physics B : Atomic, Molecular and Optical Physics 30: 17 3821-3831

Search for doubly charged negative ions of small carbon clusters

2008-12-10T08:37:24Z

D Mathur, V R Bhardwaj, F A Rajgara, C P Safvan (1997) Chemical Physics Letters 277: 5-6 558-563

On the collisional detachment of two electrons from C4

2008-12-10T08:37:58Z

V r Bhardwaj, C P Safvan, D Mathur, A K Gupta (1997) International Journal of Mass Spectrometry and Ion Processes 163: 1-2 141-147

Laser ablation of carbon clusters in high charge states

2008-12-10T08:32:40Z

C P Safvan, F A Rajgara, V R Bhardwaj, G Ravindra Kumar, D Mathur (1996) Chemical Physics Letters 255: 1-3 25-31

Molecular pendular states in intense laser fields

2008-12-10T08:32:17Z

G Ravindra Kumar, P Gross, C P Safvan, F A Rajgara, D Mathur (1996) Physical Review A 53: 5

Dissociation dynamics of in intense laser fields : directional specificity of and fragments

2009-08-07T04:01:01Z

The dissociation dynamics of bent molecules in an intense polarized light field produced by 35 ps wide laser pulses at 532 nm has been investigated by measuring the angular distributions of and ions emanating from dissociative ionization of . These angular distributions show a remarkable directional specificity: ions are preferentially formed in a direction which is parallel to the polarization ve...

C P Safvan, K Vijayalakshmi, F A Rajgara, G Ravindra Kumar, V R Marathe, D Mathur (1996) Journal of Physics B: Atomic, Molecular and Optical Physics 29: 13 L481-L487

Pendular motion of linear in intense laser fields

2008-12-10T08:31:56Z

We present high-resolution measurements of the angular distributions of , and fragments from in intense, polarized, picosecond laser fields. Distinctly anisotropic angular distributions are measured in all cases. Some evidence is obtained of lobe-like structure in these distributions; these are indicative of pendular motion of molecules aligned along the polarization axis of the laser field. Resul...

G Ravindra Kumar, P Gross, C P Safvan, F A Rajgara, D Mathur (1996) Journal of Physics B : Atomic, Molecular and Optical Physics 29: 3

Single and multiple ionization of in intense laser fields : wavelength dependence and energetics

2009-08-07T04:01:21Z

Single and multiple ionization of carbon disulphide by intense picosecond laser fields is the subject of this paper. Mass spectra were measured at five wavelengths from the infrared to the ultraviolet. In terms of the Keldysh adiabaticity parameter, we cover both the multiphoton and the tunnelling regimes. The dynamics of the dissociative ionization process is shown to be dependent upon the regime...

C P Safvan, V R Bhardwaj, G Ravindra Kumar, D Mathur, F A Rajgara (1996) Journal of Physics B: Atomic, Molecular and Optical Physics 29: 14 3135-3149

Two-electron processes in the ionization of $H2$ and $D2$ by fast protons

2009-08-07T04:01:48Z

Bhas Bapat, E Krishnakumar, C P Safvan, M J Singh, S K Goel, R Shanker (1996) Phys. Rev. A 54: 4 2925-2929

Double detachment of electrons from C2-

2008-12-10T08:35:20Z

C P Safvan, V R Bhardwaj, D Mathur, A K Gupta (1996) Chemical Physics Letters 259: 3-4 415-419

State-selective single-electron capture in very slow collisions between metastable N22+ ions and neutral atoms and molecules

2008-12-10T08:34:15Z

E Y Kamber, K Akgüngör, C P Safvan, D Mathur (1996) Chemical Physics Letters 258: 3-4 336-341

Dissociation dynamics of molecular ions in very high charge states

2008-12-10T08:30:19Z

An attempt is made to relate the dissociation dynamics of highly charged molecular ions (possessing charges in excess of 2+) to molecular structure. High-level, ab initio configuration-interaction calculations are carried out of the potential energy functions of N2q+, for q = 2-12, and predictions are made of the values of the kinetic energies released upon unimolecular dissociation of such ions. ...

C P Safvan, M Krishnamurthy, D. Mathur (1995) Rapid Communications in Mass Spectrometry 9: 4 352-357

Study of the interactions of intense laser beams and of fast-ion beams with molecules

2008-12-10T08:30:41Z

Molecular dynamics in intense, pulsed laser fields is an emerging frontier of research in laser-matter interactions. Mass spectrometric techniques are essential to understanding the behaviour of molecules in such fields. We present some salient features of this activity and review some of our recent experimental observations. Results concerning the roles of dissociation and ionization of simple di...

C P Safvan, F A Rajgara, D Mathur, G. Ravindra Kumar (1995) Rapid Communications in Mass Spectrometry 9: 4 329-335

Measurements of dication lifetimes by translational energy spectrometry

2008-12-10T08:31:03Z

A new application of mass spectrometry to experimental studies of molecular dynamics has been developed and implemented in which ion translational energy spectrometry at very high angular resolutions is utilized to study the unimolecular dissociation of metastable dications. A brief overview is presented of the experimental technique, which utilizes a lsquohome-madersquo, three-sector (equivalent ...

D Mathur, C. P. Safvan (1995) Rapid Communications in Mass Spectrometry 9: 4 325-328

Long-lived, doubly charged diatomic and triatomic molecular ions

2008-12-10T08:31:28Z

Lifetimes of doubly charged diatomic and triatomic molecules have been measured by monitoring the decay curves of such ions in a heavy-ion storage ring. CO2+, N22+, CO22+, CS22+ and SH2+ are all found to possess long-lived components which survive for time periods greater than a few seconds. All these dications are found to be essentially stable and their ultimate destruction is due to interaction...

D Mathur, L H Andersen, P Hvelplund, D Kella, C P Safvan (1995) Journal of Physics B : Atomic, Molecular and Optical Physics 28: 15 3415-3426

Dissociation of highly charged N2q+ (q$>$=2) ions via non-Coulombic potential energy curves

2008-12-10T08:27:23Z

The kinetic energies released (KER) upon dissociation of N2q+ (q=2-10) ions are investigated by means of large scale, all-electron, ab initio, configuration interaction molecular orbital calculations. Results indicate that dissociation via non-Coulombic potential energy curves of N2q+ ions yields lower values of KER than would be expected from purely Coulombic considerations due to the significanc...

C P Safvan, D Mathur (1994) Journal of Physics B : Atomic, Molecular and Optical Physics 27: 17 4073-4081

Lifetime measurements by ion translational energy spectrometry : metastable SH2+ ions

2008-12-10T08:26:57Z

Ion translational energy spectrometry has been used to determine the lifetime against spontaneous (unimolecular) dissociation of doubly charged molecular ions by studying the kinetic energies of fragment ions. Analysis of the shapes of the fragment ion kinetic energy distributions yields information on the lifetime of the precursor molecular ion. A value of 0.75+or-0.25 mu s is deduced for the lif...

C P Safvan, D Mathur (1994) Journal of Physics B : Atomic, Molecular and Optical Physics 27: 15

Comparison of the dissociative ionization of CS2 in intense laser fields and by charged particle impact : orientational effects caused by light polarization?

2008-12-10T08:27:50Z

A comprehensive comparative study of dissociative ionization of a linear triatomic species, carbon disulphide (S-C-S), has been made using a battery of different interactions involving (i) intense laser fields, (ii) fast, highly-charged, positive ion projectiles (90 MeV Si8+ and F7+), (iii) negative ion projectiles (70 keV O-, Si- and C-) and (iv) fast (700 eV) electrons. The main focus is on the ...

D Mathur, G Ravindra Kumar, C P Safvan, F A Rajgara (1994) Journal of Physics B : Atomic, Molecular and Optical Physics 27: 17

Molecular-orientation effects in the dissociative ionization of $CH4$ in intense laser fields

2009-08-07T04:00:18Z

D Mathur, C P Safvan, G Ravindra Kumar, M Krishnamurthy (1994) Phys. Rev. A 50: 1

Intense laser field ionisation of CS2 at 532 nm. Does dissociation precede ionisation?

2008-12-10T08:28:28Z

G Ravindra Kumar, C P Safvan, F A Rajgara, D Mathur (1994) Chemical Physics Letters 217: 5-6 626-630

Dissociative ionization of molecules by intense laser fields at 532 nm and 1012-1014 W cm-2

2008-12-10T08:28:53Z

Ionization and dissociative ionization of N2, CO, CS2, CO2 and NO2 by intense 532 nm radiation has been studied by measuring mass spectra at incident laser intensities over the range 4.1*1012-1.27*1014 W cm-2, covering a region which is intermediate between the multiphoton and tunnelling regimes. For molecules with large zero-field dissociation energies (N2, CO) the mass spectra show the dominance...

G Ravindra Kumar, C P Safvan, F A Rajgara, D Mathur (1994) Journal of Physics B : Atomic, Molecular and Optical Physics 27: 14 2981-2991

Electron impact ionization of H2O ice

2008-12-10T08:25:07Z

Electron impact ionization and dissociative ionization of water in vapour and ice form has been studied using a newly developed apparatus comprising a well-collimated beam of 700 eV electrons, a cryogenic target assembly and a quadrupole mass spectrometer. The target assembly consists of a liquid-nitrogen cooled nickel foil upon which a thin layer of ice is formed. Comparison of the vapour-phase m...

U T Raheja, D Mathur, C. P. Safvan (1993) Rapid Communications in Mass Spectrometry 7: 7 620-622

On the determination of the lifetime of metastable doubly charged molecules by ion translational energy spectrometry : CO2+

2008-12-10T08:25:38Z

Ion translational energy spectrometry has been applied to study the kinetic energies of fragment ions resulting from spontaneous (unimolecular) dissociation of doubly charged molecules. Analysis of the shapes of the kinetic energy distributions yields information on the lifetime of the precursor molecular ion. A value of 1.0+or-0.25 mu s is deduced for the lifetime of CO2+ ions.

C P Safvan, D Mathur (1993) Journal of Physics B : Atomic, Molecular and Optical Physics 26: 22

Recoil ion mass spectrometry. Part 2. Formation of slow, multiply charged recoil ions in collisions of fast negative ions with Ar and Kr atoms

2008-12-10T08:26:30Z

F A Rajgara, U T Raheja, C P Safvan, M Krishnamurthy, E Krishnakumar, D Mathur (1993) International Journal of Mass Spectrometry and Ion Processes 128: 3 195-201

A long-lived triply charged diatomic ion, CS3+

2008-12-10T08:26:02Z

A metastable, triply charged, diatomic molecular ion, CS3+, has been discovered in collisions of O- and Si- with CS2 at an impact energy of 40-70 keV. Concomitant configuration interaction calculations of potential energy curves and electron density distributions have been carried out which indicate that the lowest-energy 2 Sigma g state of this molecular ion is metastable for at least 3 mu s. Pre...

C P Safvan, M Krishnamurthy, D Mathur (1993) Journal of Physics B : Atomic, Molecular and Optical Physics 26: 23