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FIZIKA A 6 (1997) 4, 149-160
 
RADIATIVE RECOMBINATION OF COLD ELECTRON WITH PROTON AND DEUTERON
S. BHATTACHARYYA, A. ROY and S. MITRA
Mailing Address: 370/1, Netaji Subhas Ch. Bose Road
Calcutta-700047, India
Gokhale Memorial Girl's College, Calcutta-700020, India
Received 21 November 1996
Revised manuscript received 24 November 1997
The paper presents calculation of the radiative recombination (RR) cross-sections of
cold electron with proton and deuteron via the two-step radiative recombination (TSRR)
process. TSRR occurs in a virtual excited state which, to conserve momentum, decays to the
ground state with the emission of a photon. The RR process due to the dipole interaction
leading to the spontaneous photo-recombination (SRR), which is known for a long time, can
not fully explain the recent experimental data. The radiative recombination is computed
for TSRR channels using field theory and Coulomb gauge. Sum of the recombination rates
from SRR and TSRR channels is compared with the experimental results.
UDC 530.145, 535.14
PACS numbers: 32.70.Fw, 34.80.Kw
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