β− decay of Tz=+112 isotopes Al37 and Si39 : Understanding Gamow-Teller strength distribution in neutron-rich nuclei
β− decay of Tz=+112 isotopes Al37 and Si39 : Understanding Gamow-Teller strength distribution in neutron-rich nuclei
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Tz= 112 同位素 Al37 和 Si39 的 β 衰变：了解富中子核中的伽莫夫-泰勒强度分布
DOI：
10.1103/physrevc.100.014323
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发表时间：
2019
影响因子：
3.1
通讯作者：
Fallon, P.
中科院分区：
文献类型：
--
作者：
Abromeit, B.;Tripathi, Vandana;Crawford, H. L.;Liddick, S. N.;Yoshida, S.;Utsuno, Y.;Bender, P. C.;Crider, B. P.;Dungan, R.;Fallon, P.
研究了原子核的衰变，以获得子核和孙核激发态的信息。获得了有关激发态的新信息，而与最近的研究相比，和的能级方案得到了确认和扩展。对于所研究的核，价质子和中子占据不同的主壳层，具有相反的宇称，因此，衰变优先和主要填充核心激发的truder态的宇称相反的子核的基态。这些低位的入侵态揭示了壳层能隙及其随中子数的演化。非常丰中子核的衰变也说明了伽莫夫-泰勒（GT）强度分布如何随中子过剩而变化。通过比较本文给出的衰变和以前的研究，我们清楚地看到GT强度分布中的奇偶效应，奇偶核的衰变表现出较强的低强度，而奇核的衰变则非常分散。为了理解态的结构和探索GT强度分布，我们采用了最先进的SDPFSDG-MU有效相互作用进行了组态相互作用壳模型计算。
decay ofnucleiandwas studied to obtain information about excited states in the daughter and granddaughter nuclei. New information on excited states has been obtained for, whereas level schemes forandwere confirmed and expanded on as compared to the most recent investigations. For the nuclei studied, the valence proton and neutron occupy different major shells with opposite parities, hence, thedecay preferentially and primarily populates core-excitedintruder states with a parity opposite to the ground state of the daughter nucleus. These low-lying intruder states shed light on theshell gap and its evolution with neutron number. Thedecay of very neutron-rich nuclei also illustrates how the Gamow-Teller (GT) strength distribution changes with neutron excess. Comparingdecay ofpresented here withfrom a previous study, we clearly see an even-odd effect in the GT strength distribution with the decay from even-even nuclei showing strong low-lying strength whereas for the oddbeing very fragmented. Configuration interaction shell-model calculations with the state-of-art SDPFSDG-MU effective interaction were performed to understand the structure of thestates and explore the GT strength distribution.