Penning-trap Q -value determination of the 71Ga(ν, e−)71Ge reaction using threshold charge breeding of on-line produced isotopes
Penning-trap Q -value determination of the 71Ga(ν, e−)71Ge reaction using threshold charge breeding of on-line produced isotopes
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使用在线产生的同位素的阈值电荷育种确定 71Ga(ν, e−)71Ge 反应的潘宁陷阱 Q 值
DOI：
10.1016/j.physletb.2013.04.019
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发表时间：
2013
影响因子：
4.4
通讯作者：
J. Dilling
中科院分区：
文献类型：
--
作者：
D. Frekers;M. Simon;C. Andreoiu;J. Bale;M. Brodeur;T. Brunner;A. Chaudhuri;U. Chowdhury;José R. Crespo López;P. Delheij;H. Ejiri;S. Ettenauer;A. Gallant;V. Gavrin;A. Grossheim;M. Harakeh;F. Jang;A. Kwiatkowski;J. Lassen;A. Lennarz;M. Luichtl;T. Ma;T. D. Macdonald;E. Mané;D. Robertson;B. Schultz;V. V. Simon;A. Teigelhöfer;J. Dilling
我们提出了第一个直接测量Ga71(ν，e−)Ge71反应的Q值的方法。测量是在Penning陷阱中对类Ne的71Ga21+和71Ge22+进行的，使用电子束离子陷阱中阈值电荷育种在线产生的母核和子核的等压线分离。此外，71Ga21+和71Ge21+的等离子样品同时存储在Penning陷阱中，并提供了单独的Q值测量。两次独立测量得到的综合Q值为233.5±1.2keV，与先前接受的ν截面计算的Q值一致。结合最近对71Ge激发态的ν响应的测量，我们得出结论，在核结构中没有进一步的不确定性，这可以消除SAGE和GALLEX校准测量之间的持续差异，这些测量是用反应堆产生的51Cr和37Ar源的中微子进行的，与理论预期之间的差异。
We present a first direct Q-value measurement of the Ga71(ν,e−)Ge71 reaction using the TITAN mass-measurement facility at ISAC/TRIUMF. The measurements were performed in a Penning trap on neon-like71Ga21+and71Ge22+using isobar separation of the on-line produced mother and daughter nuclei through threshold charge breeding in an electron-beam ion trap. In addition, isoionic samples of71Ga21+and71Ge21+were stored concurrently in the Penning trap and provided a separate Q-value measurement. Both independent measurements result in a combined Q-value of 233.5±1.2 keV, which is in agreement with the previously accepted Q-value for the ν cross-section calculations. Together with a recent measurement of the ν-response from the excited states in71Ge, we conclude that there are no further uncertainties in the nuclear structure, which could remove the persistent discrepancy between the SAGE and GALLEX calibration measurements performed with neutrinos from reactor-produced51Cr and37Ar sources and the theoretical expectation.