Evidence for a new 12C state at 13.3 MeV

M. Freer; S. Almaraz-Calderon; A. Aprahamian; N.I. Ashwood; M. Barr; B. Bucher; P. Copp; M. Couder; N. Curtis; X. Fang; F. Jung; S. Lesher; W. Lu; J.D. Malcolm; A. Roberts; W Tan; C. Wheldon; V.A. Ziman

doi:10.1103/PhysRevC.83.034314

Evidence for a new ¹²C state at 13.3 MeV

M. Freer, S. Almaraz-Calderon, A. Aprahamian, N.I. Ashwood, M. Barr, B. Bucher, P. Copp, M. Couder, N. Curtis, X. Fang, F. Jung, S. Lesher, W. Lu, J.D. Malcolm, A. Roberts, W Tan, C. Wheldon, V.A. Ziman

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Abstract

The two reactions ¹²C(⁴He, ⁴He + ⁴He + ⁴He) ⁴He and ⁹Be(⁴He, ⁴He + ^4He + ⁴He)n were measured using an array of four double-sided strip detectors. Excited states in ¹²C were reconstructed filtered by the condition that the α -decay proceeded via the ⁸Be ground state. In both measurements, evidence was found for a new state at 13.3(0.2) MeV with a width 1.7(0.2) MeV. Angular correlation measurements from the ¹²C(⁴He, ⁴He + ⁴He + ^4He) ⁴He reaction indicates that the state may have J^π = 4⁺.

Original language	English
Article number	034314
Number of pages	7
Journal	Physical Review C
Volume	83
Issue number	3
DOIs	https://doi.org/10.1103/PhysRevC.83.034314
Publication status	Published - 15 Mar 2011

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10.1103/PhysRevC.83.034314

FreerM2011Evidence
© American Physical Society
Final published version, 1.04 MBLicence: None: All rights reserved

Birmingham Nuclear Physics Group Rolling Grant
Tungate, G. (Principal Investigator), Lazzeroni, C. (Co-Investigator), Evans, P. (Co-Investigator), Jones, P. (Co-Investigator) & Freer, M. (Co-Investigator)
SCIENCE & TECHNOLOGY FACILITIES COUNCIL
1/08/08 → 31/07/13
Project: Research Councils
Advanced Fellowship - Dr Carl Wheldon
Wheldon, C. (Principal Investigator)
SCIENCE & TECHNOLOGY FACILITIES COUNCIL
29/10/07 → 28/10/12
Project: Research

Cite this

@article{200ae1beed4a49688a4941c5aabb6803,

title = "Evidence for a new 12C state at 13.3 MeV",

abstract = "The two reactions 12C(4He, 4He + 4He + 4He) 4He and 9Be(4He, 4He + 4He + 4He)n were measured using an array of four double-sided strip detectors. Excited states in 12C were reconstructed filtered by the condition that the α -decay proceeded via the 8Be ground state. In both measurements, evidence was found for a new state at 13.3(0.2) MeV with a width 1.7(0.2) MeV. Angular correlation measurements from the 12C(4He, 4He + 4He + 4He) 4He reaction indicates that the state may have Jπ = 4+. ",

author = "M. Freer and S. Almaraz-Calderon and A. Aprahamian and N.I. Ashwood and M. Barr and B. Bucher and P. Copp and M. Couder and N. Curtis and X. Fang and F. Jung and S. Lesher and W. Lu and J.D. Malcolm and A. Roberts and W Tan and C. Wheldon and V.A. Ziman",

year = "2011",

month = mar,

day = "15",

doi = "10.1103/PhysRevC.83.034314",

language = "English",

volume = "83",

journal = "Physical Review C",

publisher = "American Physical Society (APS)",

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TY - JOUR

T1 - Evidence for a new 12C state at 13.3 MeV

AU - Freer, M.

AU - Almaraz-Calderon, S.

AU - Aprahamian, A.

AU - Ashwood, N.I.

AU - Barr, M.

AU - Bucher, B.

AU - Copp, P.

AU - Couder, M.

AU - Curtis, N.

AU - Fang, X.

AU - Jung, F.

AU - Lesher, S.

AU - Lu, W.

AU - Malcolm, J.D.

AU - Roberts, A.

AU - Tan, W

AU - Wheldon, C.

AU - Ziman, V.A.

PY - 2011/3/15

Y1 - 2011/3/15

N2 - The two reactions 12C(4He, 4He + 4He + 4He) 4He and 9Be(4He, 4He + 4He + 4He)n were measured using an array of four double-sided strip detectors. Excited states in 12C were reconstructed filtered by the condition that the α -decay proceeded via the 8Be ground state. In both measurements, evidence was found for a new state at 13.3(0.2) MeV with a width 1.7(0.2) MeV. Angular correlation measurements from the 12C(4He, 4He + 4He + 4He) 4He reaction indicates that the state may have Jπ = 4+.

AB - The two reactions 12C(4He, 4He + 4He + 4He) 4He and 9Be(4He, 4He + 4He + 4He)n were measured using an array of four double-sided strip detectors. Excited states in 12C were reconstructed filtered by the condition that the α -decay proceeded via the 8Be ground state. In both measurements, evidence was found for a new state at 13.3(0.2) MeV with a width 1.7(0.2) MeV. Angular correlation measurements from the 12C(4He, 4He + 4He + 4He) 4He reaction indicates that the state may have Jπ = 4+.

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U2 - 10.1103/PhysRevC.83.034314

DO - 10.1103/PhysRevC.83.034314

M3 - Article

C2 - 9971131

VL - 83

JO - Physical Review C

JF - Physical Review C

IS - 3

M1 - 034314

ER -

Evidence for a new 12C state at 13.3 MeV

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Projects

Birmingham Nuclear Physics Group Rolling Grant

Advanced Fellowship - Dr Carl Wheldon

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Evidence for a new ¹²C state at 13.3 MeV