Anomalous Electric Dipole Conversion Coefficients in Odd-Mass Isotopes of the Heavy Elements

作者: F. Asaro , F. S. Stephens , J. M. Hollander , I. Perlman

DOI: 10.1103/PHYSREV.117.492

关键词:

摘要: A detailed review is given of experimental data on the anomalous $L$- and $M$-shell conversion coefficients low-energy electric dipole transitions observed in decays odd-$A$ nuclei high atomic number.The are consistent every case with interpretation that $E1$ ${L}_{\mathrm{III}}$ shell agree theoretical, model-independent calculated by Sliv Band Rose. It definitely established several well-measured cases ${L}_{\mathrm{I}}$ ${L}_{\mathrm{II}}$ substantially larger than theoretical values. The most striking anomaly occurs 84.2-kev transition ${\mathrm{Pa}}^{231}$, where 21 15 times values, respectively.The correlated lifetimes transitions, it shown magnitude (${L}_{\mathrm{I}}$ plus ${L}_{\mathrm{II}}$) proportional to retardation gamma-ray lifetime over from single-proton formulas. No systematic trend has been deviations individually.

参考文章(26)
J. K. Beling, J. O. Newton, B. Rose, The Decay of Am 241 Physical Review. ,vol. 87, pp. 670- 671 ,(1952) , 10.1103/PHYSREV.87.670
J. K. Beling, J. O. Newton, B. Rose, Soft Radiations from Am 241 Physical Review. ,vol. 86, pp. 1144- 1144 ,(1952) , 10.1103/PHYSREV.86.797.2
H. Jaffe, T. O. Passell, C. I. Browne, I. Perlman, GAMMA AND X-RADIATION IN THE DECAY OF Am$sup 24$$sup 1$ Physical Review. ,vol. 97, pp. 142- 150 ,(1955) , 10.1103/PHYSREV.97.142
J.F. Turner, LXXIX. The internal conversion electron spectrum of 241Am Philosophical Magazine Series 1. ,vol. 46, pp. 687- 700 ,(1955) , 10.1080/14786440708520596
J. M. Hollander, W. G. Smith, J. O. Rasmussen, ENERGY LEVELS OF Np$sup 237$ POPULATED BY ALPHA DECAY OF Am$sup 24$$sup 1$ Physical Review. ,vol. 102, pp. 1372- 1377 ,(1956) , 10.1103/PHYSREV.102.1372
G. T. Ewan, J. W. Knowles, D. R. MacKenzie, INTERNAL CONVERSION COEFFICIENTS OF $gamma$ RAYS IN Pu$sup 23$$sup 9$ Physical Review. ,vol. 108, pp. 1308- 1311 ,(1957) , 10.1103/PHYSREV.108.1308
Salomon Rosenblum, Manuel Valadares, John Milsted, Études sur la transmutation 241Am α/γ 237Np Journal de Physique et le Radium. ,vol. 18, pp. 609- 618 ,(1957) , 10.1051/JPHYSRAD:019570018011060900
Sven Gösta Nilsson, John O. Rasmussen, On anomalous conversion coefficients of dipole transitions Nuclear Physics. ,vol. 5, pp. 617- 646 ,(1958) , 10.1016/0029-5582(58)90061-0
L. B. Magnusson, INTENSITIES OF X-RAYS AND $gamma$ RAYS IN Am$sup 241$ ALPHA DECAY Physical Review. ,vol. 107, pp. 161- 170 ,(1957) , 10.1103/PHYSREV.107.161
Frank Asaro, F. L. Reynolds, I. Perlman, The Complex Alpha-Spectra of Am 241 and Cm 242 Physical Review. ,vol. 87, pp. 277- 285 ,(1952) , 10.1103/PHYSREV.87.277