Determination of a 7 × 10−11 sec halflife for the first excited state in thallium 201

Autor:	J. Lindskog, T.R. Gerholm, E. Bashandy
Rok vydání:	1960
Předmět:	Physics Nuclear and High Energy Physics Internal conversion Spectrometer chemistry Atomic theory Excited state Mixing ratio Thallium chemistry.chemical_element Half-life Atomic physics Excitation
Zdroj:	Nuclear Physics. 16:175-187
ISSN:	0029-5582
DOI:	10.1016/s0029-5582(60)81067-x
Popis:	A halflife T/sub 1/2/ = (7 plus or minus 2) x 10/sup -11/ sec was found for the first excited 330-kev state in Tl/sup 201/. The measurements were performed in an electron-electron coincidence spectrometer by means of delayed coincidence technique. A new method to reduce the influence of energy dependent instrumental time-delays was developed. The K/L/sub I/ + L/sub II/ and L/sub I/ + L/sub II//L/sub III/ ratios for the 330 kev transition were measured by means of an iron yoke double focusing spectrometer. From these measurements the mixing ratio E2/M1 was found to be 2.2 plus or minus 0.4. The transition matrix elements were calculated and are compared with the corresponding matrix elements in Tl/sup 203/. (auth)
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::6942c80370c2f8a4a354a5d0e1557451 https://doi.org/10.1016/s0029-5582(60)81067-x Zobrazit plný text záznamu