α-decay-correlated mass measurement of Ra206, 207g,m using an α-TOF detector equipped multireflection time-of-flight mass spectrograph system
α-decay-correlated mass measurement of Ra206, 207g,m using an α-TOF detector equipped multireflection time-of-flight mass spectrograph system
复制标题
使用配备多重反射飞行时间质谱仪系统的 α-TOF 探测器对 Ra206、207g,m 进行 α 衰变相关质量测量
DOI：
10.1103/physrevc.104.044617
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发表时间：
2021
影响因子：
3.1
通讯作者：
Watan
中科院分区：
文献类型：
--
作者：
Niwase T.;Wada M.;Schury P.;Brionnet P.;Chen S. D.;Hashimoto T.;Haba H.;Hirayama Y.;Hou D. S.;Iimura S.;Ishiyama H.;Ishizawa S.;Ito Y.;Kaji D.;Kimura S.;Liu J.;Miyatake H.;Moon J. Y.;Morimoto K.;Morita K.;Nagae D.;Rosenbusch M.;Takamine A.;Tanaka T.;Watan
利用配备有飞行时间探测器的多反射飞行时间质谱仪，通过衰变相关质谱仪测量了同位素的原子质量。Ra同位素是在反应系统中以熔融-蒸发产物的形式产生的，并由日立KEN的充气反冲离子分离器GARIS-II输送。-TOF探测器通过将飞行时间信号与随后的衰变事件相关联来提供高精度的质量测量。使用配备有飞行时间探测器的多反射飞行时间质谱仪直接测量了和的质量。测得其质量超额和激发能分别为ME=3540(50)keV/c2、3538(15)keV/c2和keV。由衰变相关的飞行时间信号直接确定了衰变分支率，并由分支率计算出折合宽度为BekeV。自旋宇称是由衰变关联质量测量结果确定的。
The atomic masses of the isotopeshave been measured via decay-correlated mass spectroscopy using a multireflection time-of-flight mass spectrograph equipped with an-TOF detector. The Ra isotopes were produced as fusion-evaporation products in thereaction system and delivered by the gas-filled recoil ion separator GARIS-II at RIKEN. The-TOF detector provides for high-accuracy mass measurements by correlating time-of-flight signals with subsequent-decay events. The masses ofandwere directly measured using a multireflection time-of-flight mass spectrograph equipped with an-TOF detector. The mass excesses ofand the excitation energy ofwere determined to be ME=3540(50)keV/c2, 3538(15)keV/c2, andkeV, respectively. The-decay branching ratio of, was directly determined from decay-correlated time-of-flight signals, and the reducedwidth ofwas calculated to bekeV from the branching ratio. The spin-parity ofwas confirmed to befrom decay correlated mass measurement results.