Direct Measurement of Low-Energy Resonances in ^31P(p,α)^28Si and ^35Cl(p,α)^32S

Catalin Matei; B. H. Moazen; K. Y. Chae; K. L. Jones; R. W. Kapler; S. T. Pittman; D. W. Bardayan; C. D. Nesaraja; S. D. Pain; M. S. Smith; J. Allen; K. A. Chipps; R. Hatarik; C. Matthews; P. D. O'Malley; Timothy G Pelham; W. A. Peters; J. C. Blackmon; M. Matos; R. L. Kozub; J. Rogers; D. J. Sissom

Direct Measurement of Low-Energy Resonances in ^31P(p,α)^28Si and ^35Cl(p,α)^32S

Catalin Matei, B. H. Moazen, K. Y. Chae, K. L. Jones, R. W. Kapler, S. T. Pittman, D. W. Bardayan, C. D. Nesaraja, S. D. Pain, M. S. Smith, J. Allen, K. A. Chipps, R. Hatarik, C. Matthews, P. D. O'Malley, Timothy G Pelham, W. A. Peters, J. C. Blackmon, M. Matos, R. L. KozubJ. Rogers, D. J. Sissom

Research output: Contribution to conference › Conference Abstract › peer-review

Abstract

Reaction cycles in explosive hydrogen burning in novae and X-ray bursts influence both the energy generation and the processing of material to higher masses. The ^31P(p,α)^28Si and ^35Cl(p,α)^32S reactions are thought to lead to the formation of reaction cycles in the Si-Ar region, but the strength of these cycles depends on the (p,γ)/(p,α) reaction rate ratio. Previous attempts to measure the strength of low-energy resonances in ^32S and ^36Ar have relied on indirect methods or resulted only in setting upper limits for a number of the resonances of interest. We have measured the strength of low-energy resonances in ^32S and ^36Ar at Oak Ridge National Laboratory by using stable ^31P and ^35Cl beams and a differentially pumped windowless hydrogen gas target to detect p-α coincidences in arrays of silicon strip detectors. Details of the experimental configuration and results will be presented. ^*This work is supported in part by the U.S. DOE and NSF.

Original language	English
Pages	BAPS.2009.APR.Q12.6
Publication status	Published - 1 May 2009
Event	2009 APS April Meeting - Denver, United States Duration: 2 May 2009 → 5 May 2009 http://meetings.aps.org/Meeting/APR09/Content/1380

Conference

Conference	2009 APS April Meeting
Country/Territory	United States
City	Denver
Period	2/05/09 → 5/05/09
Internet address	http://meetings.aps.org/Meeting/APR09/Content/1380

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Matei, C., Moazen, B. H., Chae, K. Y., Jones, K. L., Kapler, R. W., Pittman, S. T., Bardayan, D. W., Nesaraja, C. D., Pain, S. D., Smith, M. S., Allen, J., Chipps, K. A., Hatarik, R., Matthews, C., O'Malley, P. D., Pelham, T. G., Peters, W. A., Blackmon, J. C., Matos, M., ... Sissom, D. J. (2009). Direct Measurement of Low-Energy Resonances in ^31P(p,α)^28Si and ^35Cl(p,α)^32S. BAPS.2009.APR.Q12.6. Abstract from 2009 APS April Meeting, Denver, Colorado, United States. http://adsabs.harvard.edu/abs/2009APS..APRQ12006M

@conference{eef7b4e8968249739278a357bce39186,

title = "Direct Measurement of Low-Energy Resonances in ^31P(p,α)^28Si and ^35Cl(p,α)^32S",

abstract = "Reaction cycles in explosive hydrogen burning in novae and X-ray bursts influence both the energy generation and the processing of material to higher masses. The ^31P(p,α)^28Si and ^35Cl(p,α)^32S reactions are thought to lead to the formation of reaction cycles in the Si-Ar region, but the strength of these cycles depends on the (p,γ)/(p,α) reaction rate ratio. Previous attempts to measure the strength of low-energy resonances in ^32S and ^36Ar have relied on indirect methods or resulted only in setting upper limits for a number of the resonances of interest. We have measured the strength of low-energy resonances in ^32S and ^36Ar at Oak Ridge National Laboratory by using stable ^31P and ^35Cl beams and a differentially pumped windowless hydrogen gas target to detect p-α coincidences in arrays of silicon strip detectors. Details of the experimental configuration and results will be presented. ^*This work is supported in part by the U.S. DOE and NSF.",

author = "Catalin Matei and Moazen, {B. H.} and Chae, {K. Y.} and Jones, {K. L.} and Kapler, {R. W.} and Pittman, {S. T.} and Bardayan, {D. W.} and Nesaraja, {C. D.} and Pain, {S. D.} and Smith, {M. S.} and J. Allen and Chipps, {K. A.} and R. Hatarik and C. Matthews and O'Malley, {P. D.} and Pelham, {Timothy G} and Peters, {W. A.} and Blackmon, {J. C.} and M. Matos and Kozub, {R. L.} and J. Rogers and Sissom, {D. J.}",

year = "2009",

month = may,

day = "1",

language = "English",

pages = "BAPS.2009.APR.Q12.6",

note = "2009 APS April Meeting ; Conference date: 02-05-2009 Through 05-05-2009",

url = "http://meetings.aps.org/Meeting/APR09/Content/1380",

}

Matei, C, Moazen, BH, Chae, KY, Jones, KL, Kapler, RW, Pittman, ST, Bardayan, DW, Nesaraja, CD, Pain, SD, Smith, MS, Allen, J, Chipps, KA, Hatarik, R, Matthews, C, O'Malley, PD, Pelham, TG, Peters, WA, Blackmon, JC, Matos, M, Kozub, RL, Rogers, J & Sissom, DJ 2009, 'Direct Measurement of Low-Energy Resonances in ^31P(p,α)^28Si and ^35Cl(p,α)^32S', 2009 APS April Meeting, Denver, United States, 2/05/09 - 5/05/09 pp. BAPS.2009.APR.Q12.6. <http://adsabs.harvard.edu/abs/2009APS..APRQ12006M>

TY - CONF

T1 - Direct Measurement of Low-Energy Resonances in ^31P(p,α)^28Si and ^35Cl(p,α)^32S

AU - Matei, Catalin

AU - Moazen, B. H.

AU - Chae, K. Y.

AU - Jones, K. L.

AU - Kapler, R. W.

AU - Pittman, S. T.

AU - Bardayan, D. W.

AU - Nesaraja, C. D.

AU - Pain, S. D.

AU - Smith, M. S.

AU - Allen, J.

AU - Chipps, K. A.

AU - Hatarik, R.

AU - Matthews, C.

AU - O'Malley, P. D.

AU - Pelham, Timothy G

AU - Peters, W. A.

AU - Blackmon, J. C.

AU - Matos, M.

AU - Kozub, R. L.

AU - Rogers, J.

AU - Sissom, D. J.

PY - 2009/5/1

Y1 - 2009/5/1

N2 - Reaction cycles in explosive hydrogen burning in novae and X-ray bursts influence both the energy generation and the processing of material to higher masses. The ^31P(p,α)^28Si and ^35Cl(p,α)^32S reactions are thought to lead to the formation of reaction cycles in the Si-Ar region, but the strength of these cycles depends on the (p,γ)/(p,α) reaction rate ratio. Previous attempts to measure the strength of low-energy resonances in ^32S and ^36Ar have relied on indirect methods or resulted only in setting upper limits for a number of the resonances of interest. We have measured the strength of low-energy resonances in ^32S and ^36Ar at Oak Ridge National Laboratory by using stable ^31P and ^35Cl beams and a differentially pumped windowless hydrogen gas target to detect p-α coincidences in arrays of silicon strip detectors. Details of the experimental configuration and results will be presented. ^*This work is supported in part by the U.S. DOE and NSF.

AB - Reaction cycles in explosive hydrogen burning in novae and X-ray bursts influence both the energy generation and the processing of material to higher masses. The ^31P(p,α)^28Si and ^35Cl(p,α)^32S reactions are thought to lead to the formation of reaction cycles in the Si-Ar region, but the strength of these cycles depends on the (p,γ)/(p,α) reaction rate ratio. Previous attempts to measure the strength of low-energy resonances in ^32S and ^36Ar have relied on indirect methods or resulted only in setting upper limits for a number of the resonances of interest. We have measured the strength of low-energy resonances in ^32S and ^36Ar at Oak Ridge National Laboratory by using stable ^31P and ^35Cl beams and a differentially pumped windowless hydrogen gas target to detect p-α coincidences in arrays of silicon strip detectors. Details of the experimental configuration and results will be presented. ^*This work is supported in part by the U.S. DOE and NSF.

UR - http://meetings.aps.org/Meeting/APR09/Session/Q12.6

M3 - Conference Abstract

SP - BAPS.2009.APR.Q12.6

T2 - 2009 APS April Meeting

Y2 - 2 May 2009 through 5 May 2009

ER -

Direct Measurement of Low-Energy Resonances in ^31P(p,α)^28Si and ^35Cl(p,α)^32S

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