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arXiv 0812.4250nucl-exnucl-th
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pp -> pp γ反应中的硬韧致辐射

Hard bremsstrahlung in the pp -> pp gamma reaction

A. Johansson, C. Wilkin

摘要:

pp -> pp伽马反应已经在310 MeV的束流能量下通过探测PROMICE-WASA设施中的两个最终质子并识别丢失的质量峰来测量。对于pp激发小于3 MeV的那些事件,最终的双质子几乎完全处于1 S 0状态,并且在这些条件下,光子c.m.完全覆盖。角θ_γ在cos ^2(θ_gamma)中观察到的线性行为表明,在这个能量下,几乎没有E2多极子的影响,尽管E1和M2的大小必须相当相似。

英文摘要:

The pp -> pp gamma reaction has been measured at a beam energy of 310 MeV by detecting both final protons in the PROMICE-WASA facility and identifying a missing-mass peak. For those events where the pp excitation is less than 3 MeV, the final diproton is almost purely in the 1S0 state and, under these conditions, there is complete coverage in the photon c.m. angle theta_gamma. The linear behaviour observed in cos^2(theta_gamma) shows that there is almost no influence of an E2 multipole at this energy, though the E1 and M2 must be rather similar in size.

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