QEC Measurement of 124,125,127-130La

Yasuaki Kojima, Masato Asai, Akihiko Osa, Mitsuo Koizumi, Toshiaki Sekine, Michihiro Shibata, Hiroshi Yamamoto, Kiyoshi Kawade, Takahiro Tachibana

Research output: Contribution to journalArticle

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Abstract

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.

Original languageEnglish
Pages (from-to)3405-3413
Number of pages9
JournalJournal of the Physical Society of Japan
Volume67
Issue number10
Publication statusPublished - 1998 Oct

Fingerprint

rays
neutrons
atomic weights
detectors
half life
fusion
evaporation
nuclei
energy
predictions
excitation

Keywords

  • β - γ coincidence
  • La[from Mo(Ar, 3pxn)
  • La[from Mo(Ar, 3pxn)
  • E = 5.4 MeV/u]
  • HPGe
  • Measured Q
  • Radioactivity

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Kojima, Y., Asai, M., Osa, A., Koizumi, M., Sekine, T., Shibata, M., ... Tachibana, T. (1998). QEC Measurement of 124,125,127-130La. Journal of the Physical Society of Japan, 67(10), 3405-3413.

QEC Measurement of 124,125,127-130La. / Kojima, Yasuaki; Asai, Masato; Osa, Akihiko; Koizumi, Mitsuo; Sekine, Toshiaki; Shibata, Michihiro; Yamamoto, Hiroshi; Kawade, Kiyoshi; Tachibana, Takahiro.

In: Journal of the Physical Society of Japan, Vol. 67, No. 10, 10.1998, p. 3405-3413.

Research output: Contribution to journalArticle

Kojima, Y, Asai, M, Osa, A, Koizumi, M, Sekine, T, Shibata, M, Yamamoto, H, Kawade, K & Tachibana, T 1998, 'QEC Measurement of 124,125,127-130La', Journal of the Physical Society of Japan, vol. 67, no. 10, pp. 3405-3413.
Kojima Y, Asai M, Osa A, Koizumi M, Sekine T, Shibata M et al. QEC Measurement of 124,125,127-130La. Journal of the Physical Society of Japan. 1998 Oct;67(10):3405-3413.
Kojima, Yasuaki ; Asai, Masato ; Osa, Akihiko ; Koizumi, Mitsuo ; Sekine, Toshiaki ; Shibata, Michihiro ; Yamamoto, Hiroshi ; Kawade, Kiyoshi ; Tachibana, Takahiro. / QEC Measurement of 124,125,127-130La. In: Journal of the Physical Society of Japan. 1998 ; Vol. 67, No. 10. pp. 3405-3413.
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