Extraction of weak transition strengths via the (3He, t) reaction at 420 MeV.
Extraction of weak transition strengths via the (3He, t) reaction at 420 MeV.
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DOI：
10.1103/physrevlett.99.202501
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发表时间：
2007-07
影响因子：
8.6
通讯作者：
R. Zegers;T. Adachi;H. Akimune;S. Austin;van den Ad M Berg;B. A. Brown;Y. Fujita;M. Fujiwara;M. Fujiwara;S. Gales;C. Guess;M. Harakeh;H. Hashimoto;K. Hatanaka;R. Hayami;G. W. Hitt;M. Howard;M. Itoh;T. Kawabata;K. Kawase;M. Kinoshita;M. Matsubara;K. Nakanishi;S. Nakayama;S. Okumura;T. Ohta;Y. Sakemi;Y. Shimbara;Y. Shimizu;C. Scholl;Cedric Simenel;Y. Tameshige;A. Tamii;M. Uchida;T. Yamagata;M. Yosoi
中科院分区：
文献类型：
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作者：
R. Zegers;T. Adachi;H. Akimune;S. Austin;van den Ad M Berg;B. A. Brown;Y. Fujita;M. Fujiwara;M. Fujiwara;S. Gales;C. Guess;M. Harakeh;H. Hashimoto;K. Hatanaka;R. Hayami;G. W. Hitt;M. Howard;M. Itoh;T. Kawabata;K. Kawase;M. Kinoshita;M. Matsubara;K. Nakanishi;S. Nakayama;S. Okumura;T. Ohta;Y. Sakemi;Y. Shimbara;Y. Shimizu;C. Scholl;Cedric Simenel;Y. Tameshige;A. Tamii;M. Uchida;T. Yamagata;M. Yosoi
用420 MeV（~ 3 He，t）反应测量了~（12）C，~（13）C，~（18）O，~（26）Mg，~（58）Ni，~（60）Ni，~（90）Zr，~（118）Sn，~（120）Sn和~（208）Pb靶上已知弱强度跃迁的微分截面。使用这些数据，它表明，该探头的强度和横截面之间的比例遵循简单的趋势作为质量数的函数。这些趋势可以用来确定有把握的伽莫夫-泰勒强度分布的比例不能通过β衰变强度校准的核。虽然扭曲波玻恩近似的理论计算高估了数据，但它们允许人们理解主要的实验特征，并预测在某些跃迁中观察到的简单趋势的偏差。
Differential cross sections for transitions of known weak strength were measured with the (3He, t) reaction at 420 MeV on targets of 12C, 13C, 18O, 26Mg, 58Ni, 60Ni, 90Zr, 118Sn, 120Sn, and 208Pb. Using these data, it is shown that the proportionalities between strengths and cross sections for this probe follow simple trends as a function of mass number. These trends can be used to confidently determine Gamow-Teller strength distributions in nuclei for which the proportionality cannot be calibrated via beta-decay strengths. Although theoretical calculations in the distorted-wave Born approximation overestimate the data, they allow one to understand the main experimental features and to predict deviations from the simple trends observed in some of the transitions.