辐射n-p俘获中束缚态单重态氘核的实验研究
Experimental search for the bound state singlet deuteron in the radiative n-p capture
摘要：
我们进行了实验研究的束缚态单重态氘核预测在一些微观计算。这个亚稳能级的预测能量在氘衰变阈值附近。这种状态应该表现在质子俘获热中子后的双光子跃迁中。该实验包括通过氢核捕获冷中子后的$γ$射线谱的高统计测量来寻找级联中的第二伽马射线。计算了束缚能在10-125 keV范围内的单重态氘核产生的截面的上限$2μ$ b（2 $σ$能级）。
英文摘要：
We performed an experimental search for the bound state singlet deuteron predicted in some microscopic calculations. The predicted energy of this metastable level is in vicinity of the deuteron disintegration threshold. This state should manifest itself in two-photon transition following thermal neutron capture by protons. The experiment consists in the search for the second gamma-ray in the cascade through a high statistics measurement of $γ$-ray spectra after cold neutron capture by hydrogen nuclei. The upper limit $2μ$b (2$σ$ level) is obtained for the cross section of the singlet deuteron production with the bound energy in the range 10-125 keV.
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