Photon Linear Polarization Coefficient of the Radiative Capture Process 2H(p, γ)3He at Thermal Energies

• 来源期刊: 中国物理快报（英文版）
• 年，卷（期）: 2012,（12）
• 页码范围: 52-56
• 页数: 5页
• 语种: 英文
• DOI: 10.1088/0256-307X/29/12/122101

摘要

The photon polarization parameter of the proton-deuteron radiative capture process at thermal proton energies is calculated up to leading order (LO),using pionless effective field theory (EFT).In order to make a comparative study of this model,we compare our results for the photon polarization parameter with the realistic Argonne v14 (AV14) and Argonne v18 (AV18) modern nucleon-nucleon potentials and Urbana Ⅸ or Tucson-Melbourne threenucleon interactions.The theoretical description of the 2H(p,γ)3 He reaction at thermal energies is complicated by the presence of the Coulomb interaction.Only the s-wave capture contribution to the thermal energy of this reaction is calculated.Three-body currents give small but significant contributions to some of the observables in the proton-deuteron radiative capture cross section at thermal neutron energies.Our result is in good agreement with the available experimental data and potential models' calculation at this order.