Lifetime measurement of the 167.1 keV state in 41Ar

E. R. White; H. Mach; L.M. Fraile; U. Köster; O. Arndt; A. Blazhev; N. Boelaert; M.J.G. Borge; R. Boutami; H. Bradley; N. Braun; Z. Dlouhy; C. Fransen; H.O.U. Fynbo; Ch. Hinke; P. Hoff; A. Joinet; A. Jokinen; J. Jolie; A. Korgul; K.-L. Kratz; T. Kröll; W. Kurcewicz; J. Nyberg; E.-M. Reillo; E. Ruchowska; W. Schwerdtfeger; G.S. Simpson; M. Stanoiu; O. Tengblad; P.G. Thirolf; V. Ugryumov; W.B. Walters

HAL : in2p3-00362851, version 1

DOI : 10.1103/PhysRevC.76.057303

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Physical Review C 76 (2007) 057303

Lifetime measurement of the 167.1 keV state in 41Ar

E. R. White, H. Mach, L.M. Fraile, U. Köster ¹, O. Arndt, A. Blazhev, N. Boelaert, M.J.G. Borge, R. Boutami, H. Bradley, N. Braun, Z. Dlouhy, C. Fransen, H.O.U. Fynbo, Ch. Hinke, P. Hoff, A. Joinet ², A. Jokinen, J. Jolie, A. Korgul, K.-L. Kratz, T. Kröll, W. Kurcewicz, J. Nyberg, E.-M. Reillo, E. Ruchowska, W. Schwerdtfeger, G.S. Simpson ³, M. Stanoiu, O. Tengblad, P.G. Thirolf, V. Ugryumov, W.B. Walters

(2007)

The Advanced-Time-Delayed method was used to measure lifetimes of the states in 41Ar populated in the beta decay of 41Cl. The nuclei 41Cl were produced at ISOLDE by 1.4-GeV proton bombardment of a thick UCx target and mass-separated as molecular ions, XeCl+. Our measured half-life of the 167.1-keV state, T1/2=315(15) ps, is significantly lower than the previously measured value of 410(30) ps. We have also determined T1/2=260(80) ps and T1/2<=46 ps for the 515.9- and 1867.7-keV states, respectively. These are the shortest lifetimes measured so far with the ultrafast timing method using the new LaBr3(Ce) crystals for gamma-ray detection.

1 :	Institut Laue-Langevin (ILL)

	ILL

2 :	Centre d'étude spatiale des rayonnements (CESR)

	CNRS : UMR5187 – Observatoire Midi-Pyrénées – INSU – Université Paul Sabatier [UPS] - Toulouse III

3 :	Laboratoire de Physique Subatomique et de Cosmologie (LPSC)

	CNRS : UMR5821 – IN2P3 – Université Joseph Fourier - Grenoble I – Institut Polytechnique de Grenoble - Grenoble Institute of Technology

Thème(s)

Physique/Physique Nucléaire Expérimentale


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Soumis le : Jeudi 19 Février 2009, 15:28:28
Dernière modification le : Jeudi 19 Février 2009, 16:31:32