Study on Nuclear Shakeoff

Abstract

Cu Kx-0.511의 3중 동시계수 스펙트럼 측정으로 65Zn의 β+의 붕괴에 따른 K-궤도전자 shakeoff probability 를 결정하여 nuclear shakeoff 현상을 연구하였다. Cu Kr과 1.116 Mev 감마선과의 동시계수 스펙트럼을 측정하여 x-선 흡수와 계측기 효율인자를 결정하였다. 65Zn의 β+ 붕괴에 따른 핵 shakeoff probability에 대하여 (26.68±7.50)×10 의 값을 얻었으며 이 값은 지난번 측정된 실험값보다 크며 LS 이론과는 4내지 5배 큰 값이 되었다. 앞으로 nuclear shakeoff 현상의 보다 정확한 설명을 우ㅏ하여서는 더 많은 실험 및 이론적 연구가 있어야 할 것으로 생각된다.

The probability of K-shell electron shakeoff in nucler β+ decay of 65Zn has been determined from measurements of Cu Kx-0.511-0.511 triple coincidence spectrum for the study of nuclear shakeoff. The coincidence measurements of the Cu K x-ray with 1.116 Mcv gamma ray 65Cu were used to determine the x-ray absoption and detector efficiency factors. The nuclear shakeoff probability in β+ decay of Zn was found to be (26.68±7.50)×10-4, which was larger than in the earlier work, and also was considerably larger than the LS theory with the factor of 4 to 5, It was suggested at this time that more experimental work as well as additional theoretical work would be needed to try to explain the nuclear shakeoff.

The probability of K-shell electron shakeoff in nucler β+ decay of 65Zn has been determined from measurements of Cu Kx-0.511-0.511 triple coincidence spectrum for the study of nuclear shakeoff. The coincidence measurements of the Cu K x-ray with 1.116 Mcv gamma ray 65Cu were used to determine the x-ray absoption and detector efficiency factors. The nuclear shakeoff probability in β+ decay of Zn was found to be (26.68±7.50)×10-4, which was larger than in the earlier work, and also was considerably larger than the LS theory with the factor of 4 to 5, It was suggested at this time that more experimental work as well as additional theoretical work would be needed to try to explain the nuclear shakeoff.