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Article: Experimentally well-constrained masses of 27P and 27S: Implications for studies of explosive binary systems

TitleExperimentally well-constrained masses of 27P and 27S: Implications for studies of explosive binary systems
Authors
KeywordsMasses of 27P and 27S
Nova outbursts
Si26(p,γ)27P reaction
X-ray bursts
Issue Date2020
PublisherElsevier: SCOAP3. The Journal's web site is located at http://www.elsevier.com/locate/physletb
Citation
Physics Letters B, 2020, v. 802, p. 135213:1-135213:6 How to Cite?
AbstractThe mass of 27P is expected to impact the X-ray burst (XRB) model predictions of burst light curves and the composition of the burst ashes, but large uncertainties and inconsistencies still exist in the reported 27P masses. We have used the β-decay spectroscopy of 27S to determine the most precise mass excess of 27P to date to be −659(9) keV, which is 63 keV (2.3σ) higher and a factor of 3 more precise than the value recommended in the 2016 Atomic Mass Evaluation. Based on the new 27P mass, the Si26(p,γ)27P reaction rate and its uncertainty were recalculated using Monte Carlo techniques. We also estimated the previously unknown mass excess of 27S to be 17678(77) keV, based on the measured β-delayed two-proton energy and the Coulomb displacement energy relations. The impact of these well-constrained masses and reaction rates on the modeling of the explosive astrophysical scenarios has been investigated by post-processing XRB and hydrodynamic nova models. Compared to the model calculations based on the masses and rates from databases, the abundance of A=26 in the burst ashes is increased by a factor of 2.4, while no substantial change was found in the XRB energy generation rate or the light curve. Our calculation also suggests that 27S is not a significant waiting point in the rapid proton capture process, and the change of the Si26(p,γ)27P reaction rate is not sufficiently large to affect the conclusion previously drawn on the nova contribution to the synthesis of galactic 26Al. © 2020 The Author
DescriptionRIBLL Collaboration
Persistent Identifierhttp://hdl.handle.net/10722/286289
ISSN
2019 Impact Factor: 4.384
2015 SCImago Journal Rankings: 3.186

 

DC FieldValueLanguage
dc.contributor.authorSun, LJ-
dc.contributor.authorXu, XX-
dc.contributor.authorHou, SQ-
dc.contributor.authorLin, CJ-
dc.contributor.authorJosé, J-
dc.contributor.authorLee, J-
dc.contributor.authorHe, JJ-
dc.contributor.authorLi, ZH-
dc.contributor.authorWang, JS-
dc.contributor.authorYuan, CX-
dc.contributor.authorHerwig, F-
dc.contributor.authorKeegans, J-
dc.contributor.authorBudner, T-
dc.contributor.authorWang, DX-
dc.contributor.authorWu, HY-
dc.contributor.authorLIANG, P-
dc.contributor.authorYang, YY-
dc.contributor.authorLam, YH-
dc.contributor.authorMa, P-
dc.contributor.authorDuan, FF-
dc.contributor.authorGao, ZH-
dc.contributor.authorHu, Q-
dc.contributor.authorBai, Z-
dc.contributor.authorMa, JB-
dc.contributor.authorWang, JG-
dc.contributor.authorZhong, FP-
dc.contributor.authorWu, CG-
dc.contributor.authorLuo, DW-
dc.contributor.authorJiang, Y-
dc.contributor.authorLiu, Y-
dc.contributor.authorHou, DS-
dc.contributor.authorLi, R-
dc.contributor.authorMa, NR-
dc.contributor.authorMa, WH-
dc.contributor.authorShi, GZ-
dc.contributor.authorYu, GM-
dc.contributor.authorPatel, D-
dc.contributor.authorJin, SY-
dc.contributor.authorWang, YF-
dc.contributor.authorYu, YC-
dc.contributor.authorZhou, QW-
dc.contributor.authorWang, P-
dc.contributor.authorHu, LY-
dc.contributor.authorWang, X-
dc.contributor.authorZang, HL-
dc.contributor.authorLI, PJ-
dc.contributor.authorZhao, QQ-
dc.contributor.authorJia, HM-
dc.contributor.authorYang, L-
dc.contributor.authorWen, PW-
dc.contributor.authorYang, F-
dc.contributor.authorPan, M-
dc.contributor.authorWang, XY-
dc.contributor.authorHu, ZG-
dc.contributor.authorChen, RF-
dc.contributor.authorLiu, ML-
dc.contributor.authorYang, WQ-
dc.contributor.authorZhao, YM-
dc.date.accessioned2020-08-31T07:01:49Z-
dc.date.available2020-08-31T07:01:49Z-
dc.date.issued2020-
dc.identifier.citationPhysics Letters B, 2020, v. 802, p. 135213:1-135213:6-
dc.identifier.issn0370-2693-
dc.identifier.urihttp://hdl.handle.net/10722/286289-
dc.descriptionRIBLL Collaboration-
dc.description.abstractThe mass of 27P is expected to impact the X-ray burst (XRB) model predictions of burst light curves and the composition of the burst ashes, but large uncertainties and inconsistencies still exist in the reported 27P masses. We have used the β-decay spectroscopy of 27S to determine the most precise mass excess of 27P to date to be −659(9) keV, which is 63 keV (2.3σ) higher and a factor of 3 more precise than the value recommended in the 2016 Atomic Mass Evaluation. Based on the new 27P mass, the Si26(p,γ)27P reaction rate and its uncertainty were recalculated using Monte Carlo techniques. We also estimated the previously unknown mass excess of 27S to be 17678(77) keV, based on the measured β-delayed two-proton energy and the Coulomb displacement energy relations. The impact of these well-constrained masses and reaction rates on the modeling of the explosive astrophysical scenarios has been investigated by post-processing XRB and hydrodynamic nova models. Compared to the model calculations based on the masses and rates from databases, the abundance of A=26 in the burst ashes is increased by a factor of 2.4, while no substantial change was found in the XRB energy generation rate or the light curve. Our calculation also suggests that 27S is not a significant waiting point in the rapid proton capture process, and the change of the Si26(p,γ)27P reaction rate is not sufficiently large to affect the conclusion previously drawn on the nova contribution to the synthesis of galactic 26Al. © 2020 The Author-
dc.languageeng-
dc.publisherElsevier: SCOAP3. The Journal's web site is located at http://www.elsevier.com/locate/physletb-
dc.relation.ispartofPhysics Letters B-
dc.rightsThis work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.-
dc.subjectMasses of 27P and 27S-
dc.subjectNova outbursts-
dc.subjectSi26(p,γ)27P reaction-
dc.subjectX-ray bursts-
dc.titleExperimentally well-constrained masses of 27P and 27S: Implications for studies of explosive binary systems-
dc.typeArticle-
dc.identifier.emailLee, J: jleehc@hku.hk-
dc.identifier.authorityLee, J=rp01902-
dc.description.naturepublished_or_final_version-
dc.identifier.doi10.1016/j.physletb.2020.135213-
dc.identifier.scopuseid_2-s2.0-85078600236-
dc.identifier.hkuros313315-
dc.identifier.volume802-
dc.identifier.spage135213:1-
dc.identifier.epage135213:6-
dc.publisher.placeNetherlands-

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