Direct Measurement of Resonances in ^{7}Be(α,γ)^{11}C Relevant to νp-Process Nucleosynthesis

A Psaltis; A A Chen; R Longland; D S Connolly; C R Brune; B Davids; J Fallis; R Giri; U Greife; D A Hutcheon; L Kroll; A Lennarz; J Liang; M Lovely; M Luo; C Marshall; S N Paneru; A Parikh; C Ruiz; A C Shotter; M Williams

doi:10.1103/PhysRevLett.129.162701

Direct Measurement of Resonances in ^{7}Be(α,γ)^{11}C Relevant to νp-Process Nucleosynthesis

A Psaltis, A A Chen, R Longland, D S Connolly, C R Brune, B Davids, J Fallis, R Giri, U Greife, D A Hutcheon, L Kroll, A Lennarz, J Liang, M Lovely, M Luo, C Marshall, S N Paneru, A Parikh, C Ruiz, A C ShotterM Williams

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6 Scopus citations

Abstract

We have performed the first direct measurement of two resonances of the ^{7}Be(α,γ)^{11}C reaction with unknown strengths using an intense radioactive ^{7}Be beam and the DRAGON recoil separator. We report on the first measurement of the 1155 and 1110 keV resonance strengths of 1.73±0.25(stat)±0.40(syst) eV and 125_{-25}^{+27}(stat)±15(syst) meV, respectively. The present results have reduced the uncertainty in the ^{7}Be(α,γ)^{11}C reaction rate to ∼9.4%-10.7% over T=1.5-3 GK, which is relevant for nucleosynthesis in the neutrino-driven outflows of core-collapse supernovae (νp process). We find no effect of the new, constrained reaction rate on νp-process nucleosynthesis.

Original language	English (US)
Pages (from-to)	162701
Journal	Physical Review Letters
Volume	129
Issue number	16
DOIs	https://doi.org/10.1103/PhysRevLett.129.162701
State	Published - Oct 14 2022

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Psaltis, A., Chen, A. A., Longland, R., Connolly, D. S., Brune, C. R., Davids, B., Fallis, J., Giri, R., Greife, U., Hutcheon, D. A., Kroll, L., Lennarz, A., Liang, J., Lovely, M., Luo, M., Marshall, C., Paneru, S. N., Parikh, A., Ruiz, C., ... Williams, M. (2022). Direct Measurement of Resonances in ^{7}Be(α,γ)^{11}C Relevant to νp-Process Nucleosynthesis. Physical Review Letters, 129(16), 162701. https://doi.org/10.1103/PhysRevLett.129.162701

Psaltis, A, Chen, AA, Longland, R, Connolly, DS, Brune, CR, Davids, B, Fallis, J, Giri, R, Greife, U, Hutcheon, DA, Kroll, L, Lennarz, A, Liang, J, Lovely, M, Luo, M, Marshall, C, Paneru, SN, Parikh, A, Ruiz, C, Shotter, AC & Williams, M 2022, 'Direct Measurement of Resonances in ^{7}Be(α,γ)^{11}C Relevant to νp-Process Nucleosynthesis', Physical Review Letters, vol. 129, no. 16, pp. 162701. https://doi.org/10.1103/PhysRevLett.129.162701

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title = "Direct Measurement of Resonances in ^{7}Be(α,γ)^{11}C Relevant to νp-Process Nucleosynthesis",

abstract = "We have performed the first direct measurement of two resonances of the ^{7}Be(α,γ)^{11}C reaction with unknown strengths using an intense radioactive ^{7}Be beam and the DRAGON recoil separator. We report on the first measurement of the 1155 and 1110 keV resonance strengths of 1.73±0.25(stat)±0.40(syst) eV and 125_{-25}^{+27}(stat)±15(syst) meV, respectively. The present results have reduced the uncertainty in the ^{7}Be(α,γ)^{11}C reaction rate to ∼9.4%-10.7% over T=1.5-3 GK, which is relevant for nucleosynthesis in the neutrino-driven outflows of core-collapse supernovae (νp process). We find no effect of the new, constrained reaction rate on νp-process nucleosynthesis.",

author = "A Psaltis and Chen, {A A} and R Longland and Connolly, {D S} and Brune, {C R} and B Davids and J Fallis and R Giri and U Greife and Hutcheon, {D A} and L Kroll and A Lennarz and J Liang and M Lovely and M Luo and C Marshall and Paneru, {S N} and A Parikh and C Ruiz and Shotter, {A C} and M Williams",

year = "2022",

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doi = "10.1103/PhysRevLett.129.162701",

language = "English (US)",

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T1 - Direct Measurement of Resonances in ^{7}Be(α,γ)^{11}C Relevant to νp-Process Nucleosynthesis

AU - Psaltis, A

AU - Chen, A A

AU - Longland, R

AU - Connolly, D S

AU - Brune, C R

AU - Davids, B

AU - Fallis, J

AU - Giri, R

AU - Greife, U

AU - Hutcheon, D A

AU - Kroll, L

AU - Lennarz, A

AU - Liang, J

AU - Lovely, M

AU - Luo, M

AU - Marshall, C

AU - Paneru, S N

AU - Parikh, A

AU - Ruiz, C

AU - Shotter, A C

AU - Williams, M

PY - 2022/10/14

Y1 - 2022/10/14

N2 - We have performed the first direct measurement of two resonances of the ^{7}Be(α,γ)^{11}C reaction with unknown strengths using an intense radioactive ^{7}Be beam and the DRAGON recoil separator. We report on the first measurement of the 1155 and 1110 keV resonance strengths of 1.73±0.25(stat)±0.40(syst) eV and 125_{-25}^{+27}(stat)±15(syst) meV, respectively. The present results have reduced the uncertainty in the ^{7}Be(α,γ)^{11}C reaction rate to ∼9.4%-10.7% over T=1.5-3 GK, which is relevant for nucleosynthesis in the neutrino-driven outflows of core-collapse supernovae (νp process). We find no effect of the new, constrained reaction rate on νp-process nucleosynthesis.

AB - We have performed the first direct measurement of two resonances of the ^{7}Be(α,γ)^{11}C reaction with unknown strengths using an intense radioactive ^{7}Be beam and the DRAGON recoil separator. We report on the first measurement of the 1155 and 1110 keV resonance strengths of 1.73±0.25(stat)±0.40(syst) eV and 125_{-25}^{+27}(stat)±15(syst) meV, respectively. The present results have reduced the uncertainty in the ^{7}Be(α,γ)^{11}C reaction rate to ∼9.4%-10.7% over T=1.5-3 GK, which is relevant for nucleosynthesis in the neutrino-driven outflows of core-collapse supernovae (νp process). We find no effect of the new, constrained reaction rate on νp-process nucleosynthesis.

U2 - 10.1103/PhysRevLett.129.162701

DO - 10.1103/PhysRevLett.129.162701

M3 - Article

C2 - 36306775

SN - 0031-9007

VL - 129

SP - 162701

JO - Physical Review Letters

JF - Physical Review Letters

IS - 16

ER -

Direct Measurement of Resonances in ^{7}Be(α,γ)^{11}C Relevant to νp-Process Nucleosynthesis

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