Searching for resonances in the unbound 6Be nucleus by using a radioactive 7Be beam

K. Y. Chae; D. W. Bardayan; J. C. Blackmon; M. S. Smith; A. E. Champagne; R. P. Fitzgerald; D. W. Visser; J. J. Das; V. Guimarães; K. L. Jones; S. D. Pain; J. S. Thomas; M. S. Johnson; R. L. Kozub; R. J. Livesay; Z. Ma; C. D. Nesaraja

doi:10.3938/jkps.61.1786

Searching for resonances in the unbound ⁶Be nucleus by using a radioactive ⁷Be beam

K. Y. Chae, D. W. Bardayan, J. C. Blackmon, M. S. Smith, A. E. Champagne, R. P. Fitzgerald, D. W. Visser, J. J. Das, V. Guimarães, K. L. Jones, S. D. Pain, J. S. Thomas, M. S. Johnson, R. L. Kozub, R. J. Livesay, Z. Ma, C. D. Nesaraja

Nuclear Structure and Nuclear Astrophysi

Research output: Contribution to journal › Article › peer-review

5 Scopus citations

Abstract

Knowledge of the ³He(³He,2p)⁴He reaction is important for understanding stellar burning and solar neutrino production. Previous measurements have found a surprisingly large rise in the cross section at low energies that could be due to a low-energy resonance in the ³He + ³He (⁶Be) system or electron screening. In the ⁶Be nucleus, however, no excited states have been observed above the first 2⁺ state at E_x = 1. 67 MeV up to 23 MeV, even though several are expected. The ²H(⁷Be,³H)⁶Be reaction has been studied for the first time to search for resonances in the ⁶Be nucleus that may affect our understanding of the ³He(³He,2p)⁴He reaction. A 100-MeV radioactive ⁷Be beam from the Holifield Radioactive Ion Beam Facility (HRIBF) was used to bombard CD₂ targets, and tritons were detected by using the silicon detector array (SIDAR). A combination of reaction mechanisms appears to be necessary to explain the observed triton energy spectrum.

Original language	English
Pages (from-to)	1786-1791
Number of pages	6
Journal	Journal of the Korean Physical Society
Volume	61
Issue number	11
DOIs	https://doi.org/10.3938/jkps.61.1786
State	Published - 2012

Funding

This work was supported in part by Samsung Research Fund (Sungkyunkwan University, 2012), by the National Science Foundation under contract No. NSF-PHY-00-98800, and by the US Department of Energy under contract numbers DE-AC05-00OR22725 (ORNL), DE-FG02-96ER40955 (TTU) and DE-FG02-96ER40983 (UT).

Keywords

Inverse kinematics
Radioactive ion beams
Silicon detectors
Transfer reactions

Access to Document

10.3938/jkps.61.1786

Cite this

Chae, K. Y., Bardayan, D. W., Blackmon, J. C., Smith, M. S., Champagne, A. E., Fitzgerald, R. P., Visser, D. W., Das, J. J., Guimarães, V., Jones, K. L., Pain, S. D., Thomas, J. S., Johnson, M. S., Kozub, R. L., Livesay, R. J., Ma, Z., & Nesaraja, C. D. (2012). Searching for resonances in the unbound ⁶Be nucleus by using a radioactive ⁷Be beam. Journal of the Korean Physical Society, 61(11), 1786-1791. https://doi.org/10.3938/jkps.61.1786

@article{259743c718d54a16896f89d226f9afba,

title = "Searching for resonances in the unbound 6Be nucleus by using a radioactive 7Be beam",

abstract = "Knowledge of the 3He(3He,2p)4He reaction is important for understanding stellar burning and solar neutrino production. Previous measurements have found a surprisingly large rise in the cross section at low energies that could be due to a low-energy resonance in the 3He + 3He (6Be) system or electron screening. In the 6Be nucleus, however, no excited states have been observed above the first 2+ state at Ex = 1. 67 MeV up to 23 MeV, even though several are expected. The 2H(7Be,3H)6Be reaction has been studied for the first time to search for resonances in the 6Be nucleus that may affect our understanding of the 3He(3He,2p)4He reaction. A 100-MeV radioactive 7Be beam from the Holifield Radioactive Ion Beam Facility (HRIBF) was used to bombard CD2 targets, and tritons were detected by using the silicon detector array (SIDAR). A combination of reaction mechanisms appears to be necessary to explain the observed triton energy spectrum.",

keywords = "Inverse kinematics, Radioactive ion beams, Silicon detectors, Transfer reactions",

author = "Chae, \{K. Y.\} and Bardayan, \{D. W.\} and Blackmon, \{J. C.\} and Smith, \{M. S.\} and Champagne, \{A. E.\} and Fitzgerald, \{R. P.\} and Visser, \{D. W.\} and Das, \{J. J.\} and V. Guimar{\~a}es and Jones, \{K. L.\} and Pain, \{S. D.\} and Thomas, \{J. S.\} and Johnson, \{M. S.\} and Kozub, \{R. L.\} and Livesay, \{R. J.\} and Z. Ma and Nesaraja, \{C. D.\}",

year = "2012",

doi = "10.3938/jkps.61.1786",

language = "English",

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Chae, KY, Bardayan, DW, Blackmon, JC, Smith, MS, Champagne, AE, Fitzgerald, RP, Visser, DW, Das, JJ, Guimarães, V, Jones, KL, Pain, SD, Thomas, JS, Johnson, MS, Kozub, RL, Livesay, RJ, Ma, Z & Nesaraja, CD 2012, 'Searching for resonances in the unbound ⁶Be nucleus by using a radioactive ⁷Be beam', Journal of the Korean Physical Society, vol. 61, no. 11, pp. 1786-1791. https://doi.org/10.3938/jkps.61.1786

TY - JOUR

T1 - Searching for resonances in the unbound 6Be nucleus by using a radioactive 7Be beam

AU - Chae, K. Y.

AU - Bardayan, D. W.

AU - Blackmon, J. C.

AU - Smith, M. S.

AU - Champagne, A. E.

AU - Fitzgerald, R. P.

AU - Visser, D. W.

AU - Das, J. J.

AU - Guimarães, V.

AU - Jones, K. L.

AU - Pain, S. D.

AU - Thomas, J. S.

AU - Johnson, M. S.

AU - Kozub, R. L.

AU - Livesay, R. J.

AU - Ma, Z.

AU - Nesaraja, C. D.

PY - 2012

Y1 - 2012

N2 - Knowledge of the 3He(3He,2p)4He reaction is important for understanding stellar burning and solar neutrino production. Previous measurements have found a surprisingly large rise in the cross section at low energies that could be due to a low-energy resonance in the 3He + 3He (6Be) system or electron screening. In the 6Be nucleus, however, no excited states have been observed above the first 2+ state at Ex = 1. 67 MeV up to 23 MeV, even though several are expected. The 2H(7Be,3H)6Be reaction has been studied for the first time to search for resonances in the 6Be nucleus that may affect our understanding of the 3He(3He,2p)4He reaction. A 100-MeV radioactive 7Be beam from the Holifield Radioactive Ion Beam Facility (HRIBF) was used to bombard CD2 targets, and tritons were detected by using the silicon detector array (SIDAR). A combination of reaction mechanisms appears to be necessary to explain the observed triton energy spectrum.

AB - Knowledge of the 3He(3He,2p)4He reaction is important for understanding stellar burning and solar neutrino production. Previous measurements have found a surprisingly large rise in the cross section at low energies that could be due to a low-energy resonance in the 3He + 3He (6Be) system or electron screening. In the 6Be nucleus, however, no excited states have been observed above the first 2+ state at Ex = 1. 67 MeV up to 23 MeV, even though several are expected. The 2H(7Be,3H)6Be reaction has been studied for the first time to search for resonances in the 6Be nucleus that may affect our understanding of the 3He(3He,2p)4He reaction. A 100-MeV radioactive 7Be beam from the Holifield Radioactive Ion Beam Facility (HRIBF) was used to bombard CD2 targets, and tritons were detected by using the silicon detector array (SIDAR). A combination of reaction mechanisms appears to be necessary to explain the observed triton energy spectrum.

KW - Inverse kinematics

KW - Radioactive ion beams

KW - Silicon detectors

KW - Transfer reactions

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