Precise branching ratios to unbound 12C states from 12N and 12B [beta]-decays
Artikel i vetenskaplig tidskrift, 2009

Two complementary experimental techniques have been used to extract precise branching ratios to unbound states in 12C from 12N and 12B [beta]-decays. In the first the three [alpha]-particles emitted after [beta]-decay are measured in coincidence in separate detectors, while in the second method 12N and 12B are implanted in a detector and the summed energy of the three [alpha]-particles is measured directly. For the narrow states at 7.654 MeV (0+) and 12.71 MeV (1+) the resulting branching ratios are both smaller than previous measurements by a factor of [similar, equals]2. The experimental results are compared to no-core shell model calculations with realistic interactions from chiral perturbation theory, and inclusion of three-nucleon forces is found to give improved agreement.

Författare

S. Hyldegaard

Aarhus Universitet

Christian Forssen

Chalmers, Teknisk fysik, Subatomär fysik

C. A. Diget

University of York

M. Alcorta

CSIC - Instituto de Estructura de la Materia (IEM)

F.C. Barker

Australian National University

B. Bastin

KU Leuven

M. J. G. Borge

CSIC - Instituto de Estructura de la Materia (IEM)

R. Boutami

CSIC - Instituto de Estructura de la Materia (IEM)

S. Brandenburg

Kernfysisch Versneller Institut

J. Büscher

KU Leuven

P. Dendooven

Kernfysisch Versneller Institut

P. Van Duppen

KU Leuven

T. Eronen

Jyväskylän Yliopisto

S. Fox

University of York

B. Fulton

University of York

H. O. U. Fynbo

Aarhus Universitet

J. Huikari

Jyväskylän Yliopisto

M. Huyse

KU Leuven

H. B. Jeppesen

Lawrence Berkeley National Laboratory

A. Jokinen

Jyväskylän Yliopisto

Björn Jonson

Chalmers, Teknisk fysik, Subatomär fysik

K. Jungmann

Kernfysisch Versneller Institut

A. Kankainen

Jyväskylän Yliopisto

O. Kirsebom

Aarhus Universitet

M. Madurga

CSIC - Instituto de Estructura de la Materia (IEM)

I. Moore

Jyväskylän Yliopisto

P. Navrátil

Lawrence Livermore National Laboratory

Thomas Nilsson

Chalmers, Teknisk fysik, Subatomär fysik

Göran Hugo Nyman

Chalmers, Teknisk fysik, Subatomär fysik

G.J.G. Onderwater

Kernfysisch Versneller Institut

H. Penttilä

Jyväskylän Yliopisto

K. Peräjärvi

Jyväskylän Yliopisto

R. Raabe

KU Leuven

K. Riisager

Aarhus Universitet

S. Rinta-Antila

Jyväskylän Yliopisto

A. Rogachevskiy

Kernfysisch Versneller Institut

A. Saastamoinen

Jyväskylän Yliopisto

M. Sohani

Kernfysisch Versneller Institut

O. Tengblad

CSIC - Instituto de Estructura de la Materia (IEM)

E. Traykov

Kernfysisch Versneller Institut

James P. Vary

Iowa State University

Y. Wang

Jyväskylän Yliopisto

K. Wilhelmsen

Chalmers

H.W. Wilschut

Kernfysisch Versneller Institut

J. Aysto

Jyväskylän Yliopisto

Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

0370-2693 (ISSN)

Vol. 678 5 459 - 464

Ämneskategorier

Subatomär fysik

Astronomi, astrofysik och kosmologi

DOI

10.1016/j.physletb.2009.06.064