TY - JOUR
T1 - QEC Measurement of 124,125,127-130La
AU - Kojima, Yasuaki
AU - Asai, Masato
AU - Osa, Akihiko
AU - Koizumi, Mitsuo
AU - Sekine, Toshiaki
AU - Shibata, Michihiro
AU - Yamamoto, Hiroshi
AU - Kawade, Kiyoshi
AU - Tachibana, Takahiro
PY - 1998/10
Y1 - 1998/10
N2 - For neutron-deficient 124,125,127-130La, QEC measurement has been performed by determining β+-ray maximum energies. The radioactive sources were prepared by on-line mass-separation following the fusion-evaporation reactions 92,natMo(36Ar, 3pxn). The β+-rays were measured with an HPGe detector in β - γ coincidence mode in which γ-rays were detected with another HPGe detector for specifying an excited state in daughter nucleus. By unfolding the β+-ray spectra using experimental response functions, the QEC-values of 124,125,127,130La were newly obtained, and those of 128,129La were improved in their accuracy. The QEC-values obtained and the resulting atomic masses are compared with theoretical predictions. The results of half-life calculation and two-neutron separation energies using the experimental QEC-values are also discussed.
AB - For neutron-deficient 124,125,127-130La, QEC measurement has been performed by determining β+-ray maximum energies. The radioactive sources were prepared by on-line mass-separation following the fusion-evaporation reactions 92,natMo(36Ar, 3pxn). The β+-rays were measured with an HPGe detector in β - γ coincidence mode in which γ-rays were detected with another HPGe detector for specifying an excited state in daughter nucleus. By unfolding the β+-ray spectra using experimental response functions, the QEC-values of 124,125,127,130La were newly obtained, and those of 128,129La were improved in their accuracy. The QEC-values obtained and the resulting atomic masses are compared with theoretical predictions. The results of half-life calculation and two-neutron separation energies using the experimental QEC-values are also discussed.
KW - E = 5.4 MeV/u]
KW - HPGe
KW - La[from Mo(Ar, 3pxn)
KW - La[from Mo(Ar, 3pxn)
KW - Measured Q
KW - Radioactivity
KW - β - γ coincidence
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U2 - 10.1143/JPSJ.67.3405
DO - 10.1143/JPSJ.67.3405
M3 - Article
AN - SCOPUS:0032262975
VL - 67
SP - 3405
EP - 3413
JO - Journal of the Physical Society of Japan
JF - Journal of the Physical Society of Japan
SN - 0031-9015
IS - 10
ER -