How Robust is the N = 34 Subshell Closure? First Spectroscopy of 52Ar
The first γ -ray spectroscopy of 52Ar, with the neutron number N = 34, was measured using the 53K (p, 2p) one-proton removal reaction at ∼ 210 MeV / u at the RIBF facility. The 2+1 excitation energy is found at 1656(18) keV, the highest among the Ar isotopes with N > 20. This result is the first...
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| Veröffentlicht in: | Physical review letters 2019-02, Vol.122 (7), p.072502 |
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| description | The first γ -ray spectroscopy of 52Ar, with the neutron number N = 34, was measured using the 53K (p, 2p) one-proton removal reaction at ∼ 210 MeV / u at the RIBF facility. The 2+1 excitation energy is found at 1656(18) keV, the highest among the Ar isotopes with N > 20. This result is the first experimental signature of the persistence of the N = 34 subshell closure beyond 54Ca, i.e., below the magic proton number Z = 20. Shell-model calculations with phenomenological and chiral-effective-field-theory interactions both reproduce the measured 2+1 systematics of neutron-rich Ar isotopes, and support a N = 34 subshell closure in 52Ar. |
| doi_str_mv | 10.1103/PhysRevLett.122.072502 |
| format | Article |
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First Spectroscopy of 52Ar</title><source>American Physical Society Journals</source><source>EZB-FREE-00999 freely available EZB journals</source><creator>Liu, H N</creator><creatorcontrib>Liu, H N</creatorcontrib><description>The first γ -ray spectroscopy of 52Ar, with the neutron number N = 34, was measured using the 53K (p, 2p) one-proton removal reaction at ∼ 210 MeV / u at the RIBF facility. The 2+1 excitation energy is found at 1656(18) keV, the highest among the Ar isotopes with N > 20. This result is the first experimental signature of the persistence of the N = 34 subshell closure beyond 54Ca, i.e., below the magic proton number Z = 20. Shell-model calculations with phenomenological and chiral-effective-field-theory interactions both reproduce the measured 2+1 systematics of neutron-rich Ar isotopes, and support a N = 34 subshell closure in 52Ar.</description><identifier>ISSN: 0031-9007</identifier><identifier>EISSN: 1079-7114</identifier><identifier>DOI: 10.1103/PhysRevLett.122.072502</identifier><language>eng</language><publisher>College Park: American Physical Society</publisher><subject>Augmented reality ; Field theory ; Isotopes ; Spectrum analysis</subject><ispartof>Physical review letters, 2019-02, Vol.122 (7), p.072502</ispartof><rights>Copyright American Physical Society Feb 22, 2019</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,780,784,27924,27925</link.rule.ids></links><search><creatorcontrib>Liu, H N</creatorcontrib><title>How Robust is the N = 34 Subshell Closure? First Spectroscopy of 52Ar</title><title>Physical review letters</title><description>The first γ -ray spectroscopy of 52Ar, with the neutron number N = 34, was measured using the 53K (p, 2p) one-proton removal reaction at ∼ 210 MeV / u at the RIBF facility. The 2+1 excitation energy is found at 1656(18) keV, the highest among the Ar isotopes with N > 20. This result is the first experimental signature of the persistence of the N = 34 subshell closure beyond 54Ca, i.e., below the magic proton number Z = 20. Shell-model calculations with phenomenological and chiral-effective-field-theory interactions both reproduce the measured 2+1 systematics of neutron-rich Ar isotopes, and support a N = 34 subshell closure in 52Ar.</description><subject>Augmented reality</subject><subject>Field theory</subject><subject>Isotopes</subject><subject>Spectrum analysis</subject><issn>0031-9007</issn><issn>1079-7114</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2019</creationdate><recordtype>article</recordtype><recordid>eNotjl1LwzAYRoMoWKd_QQJed75vPprkQmSUzQlFZdPr0aYp3SimNqlj_96KXp2bw3keQm4R5ojA79_aU9i478LFOEfG5qCYBHZGEgRlUoUozkkCwDE1AOqSXIVwAABkmU7Icu2PdOOrMUS6DzS2jr7QB8oF3Y5VaF3X0bzzYRzcI13th8na9s7GwQfr-xP1DZVsMVyTi6bsgrv554x8rJbv-TotXp-e80WR9og8pjV3Tma2kUJIsE2dVbXNlLFQm8aY30-VlNoYq1mlkItMcFUaw3RZclNbzWfk7q_bD_5rdCHuDn4cPqfJHUOdmcmVjP8AcIhNsg</recordid><startdate>20190222</startdate><enddate>20190222</enddate><creator>Liu, H N</creator><general>American Physical Society</general><scope>7U5</scope><scope>8FD</scope><scope>H8D</scope><scope>L7M</scope></search><sort><creationdate>20190222</creationdate><title>How Robust is the N = 34 Subshell Closure? 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First Spectroscopy of 52Ar</atitle><jtitle>Physical review letters</jtitle><date>2019-02-22</date><risdate>2019</risdate><volume>122</volume><issue>7</issue><spage>072502</spage><pages>072502-</pages><issn>0031-9007</issn><eissn>1079-7114</eissn><abstract>The first γ -ray spectroscopy of 52Ar, with the neutron number N = 34, was measured using the 53K (p, 2p) one-proton removal reaction at ∼ 210 MeV / u at the RIBF facility. The 2+1 excitation energy is found at 1656(18) keV, the highest among the Ar isotopes with N > 20. This result is the first experimental signature of the persistence of the N = 34 subshell closure beyond 54Ca, i.e., below the magic proton number Z = 20. Shell-model calculations with phenomenological and chiral-effective-field-theory interactions both reproduce the measured 2+1 systematics of neutron-rich Ar isotopes, and support a N = 34 subshell closure in 52Ar.</abstract><cop>College Park</cop><pub>American Physical Society</pub><doi>10.1103/PhysRevLett.122.072502</doi><oa>free_for_read</oa></addata></record> |
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| source | American Physical Society Journals; EZB-FREE-00999 freely available EZB journals |
| subjects | Augmented reality Field theory Isotopes Spectrum analysis |
| title | How Robust is the N = 34 Subshell Closure? First Spectroscopy of 52Ar |
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