Precise Half-Life Measurements for 38Ca and 39Ca Articles uri icon

authors

  • DOMINGUEZ REYES, RICARDO
  • BLANK, B.
  • DEMONCHY, C.-E.
  • FRAILE, L.M.
  • GIOVINAZZO, J.
  • TRONG HUI, TRAN
  • HUIKARI, J.
  • LUNNEY, D.
  • MUNOZ, F.
  • PEDROZA, J.-L.
  • PLAISIR, C.
  • SERANI, L.
  • BEY, A.
  • STURM, S.
  • TENGBLAD, O.
  • WENANDER, F.
  • MATEA, I.
  • SOUIN, J.
  • AUDIRAC, L.
  • BORGE, M. J. G.
  • CANCHEL, G.
  • DELAHAYE, P.
  • DELALEE, F.

publication date

  • December 2010

start page

  • 363

end page

  • 372

issue

  • 3

volume

  • 44

International Standard Serial Number (ISSN)

  • 1434-6001

Electronic International Standard Serial Number (EISSN)

  • 1434-601X

abstract

  • The half-lives of 38Ca and 39Ca have been measured at ISOLDE of CERN. The REXTRAP facility was used to prepare ultra-clean samples of radioactive nuclei for precision decay spectroscopy. 38Ca is one of the T z = - 1 , 0+ --> 0+ beta -emitting nuclides used to determine the vector coupling constant of the weak interaction and the Vud quark-mixing matrix element. The result obtained, T 1/2 = 443.8(19) ms, is four times more precise than the average of previous measurements. For 39Ca , a half-life of T 1/2 = 860.7(10) ms is obtained, a result in agreement with the average value from the literature.

keywords

  • beta decay; proton decay; gamma decay