Monoenergetic Positon Line and Other Positon Distributions in the 152 Eu Decay
作者： B Svahn , C Bergman , H Pettersson
DOI: 10.1088/0031-8949/5/1-2/004
关键词:
摘要: The monoenergetic K-positon line from the 1 408 keV transition in 152Sm was sought using an intense 152Eu source a double focussing spectrometer equipped with cooled Si(Li) detector. It realized that edge of internal pair positons 458 E1 located close to expected position positon line. intensity gamma determined as (3.1 ± 1.5) × 10-8. retardation factor this estimated be 550. απ/αK for 0.37 0.07 agreement theoretical ratio multipolarity. end-point energies two beta branches 727 3 and 479 10 keV, intensities (1.1 0.2) 10-4 (2.9 0.5) 10-5, respectively, giving Q-value 871 keV.
harvard.edu
sci-hub.se 参考文章(13)
治子 木村, C.M. Lederer, J.M. Hollander and I. Perlman: Table of Isotopes, Sixth Edition, John Wiley and Sons, Inc., New York・London・Sydney, 1967, 594頁, 22.5×29cm, 3,180円. 日本物理學會誌. ,vol. 23, pp. 399- 400 ,(1968)
J. H. Brunner, H. J. Leisi, C. F. Perdrisat, P. Scherrer, MONOENERGETIC POSITRONS IN THE DECAY OF Bi$sup 20$$sup 6$ Physical Review Letters. ,vol. 2, pp. 207- 209 ,(1959) , 10.1103/PHYSREVLETT.2.207
R. Lombard, F. Rys, Mono-energetic positon formation coefficient in the case of E1 transitions Nuclear Physics. ,vol. 31, pp. 163- 165 ,(1962) , 10.1016/0029-5582(62)90737-X
S. Antman, Y. Grunditz, A. Johansson, B. Nyman, H. Pettersson, B. Svahn, K. Siegbahn, IMPROVEMENTS OF A DOUBLE FOCUSSING IRON-CORE SPECTROMETER FOR HIGH RESOLUTION COINCIDENCE AND ANGULAR CORRELATION MEASUREMENTS. Nuclear Instruments and Methods. ,vol. 82, pp. 13- 23 ,(1970) , 10.1016/0029-554X(70)90319-8
L.A. Sliv, L'analyse du phénomène de production des positrons monoénergétiques Journal de Physique et le Radium. ,vol. 16, pp. 589- 593 ,(1955) , 10.1051/JPHYSRAD:01955001607058900
J. Barrette, M. Barrette, A. Boutard, G. Lamoureux, S. Monaro, S. Markiza, Transitional Nuclei. II. Properties of the Levels in 152Sm and 152Gd from the Decay of the 152Eum,g Isomeric Pair Canadian Journal of Physics. ,vol. 49, pp. 2462- 2495 ,(1971) , 10.1139/P71-295
S. Antman, B. Svahn, Silicon detector response functions to monoenergetic positons Nuclear Instruments and Methods. ,vol. 82, pp. 24- 28 ,(1970) , 10.1016/0029-554X(70)90320-4
Roland J. Lombard, Charles F. Perdrisat, Jean H. Brunner, Internal pair formation and multipolarity of nuclear transitions Nuclear Physics A. ,vol. 110, pp. 41- 55 ,(1968) , 10.1016/0375-9474(68)90681-7
J.S. Larsen, O. Skilbreid, L. Vistisen, High-energy spectra of 12 y 152Eu Nuclear Physics. ,vol. 100, pp. 248- 256 ,(1967) , 10.1016/0375-9474(67)90407-1
Abraham. Savitzky, M. J. E. Golay, Smoothing and Differentiation of Data by Simplified Least Squares Procedures. Analytical Chemistry. ,vol. 36, pp. 1627- 1639 ,(1964) , 10.1021/AC60214A047