Neutron skin and signature of the N = 14 shell gap found from measured proton radii of 17−22N
A thick neutron skin emerges from the first determination of root mean square radii of the proton distributions for 17−22N from charge changing cross section measurements around 900A MeV at GSI. Neutron halo effects are signalled for 22N from an increase in the proton and matter radii. The radii sug...
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| Format: | Article |
| Language: | English |
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Elsevier
2019-03-01
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| Series: | Physics Letters B |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0370269319300401 |
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doaj-6b25a2afb0f6463cba6bb430f008bc98 |
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Article |
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DOAJ |
| language |
English |
| format |
Article |
| sources |
DOAJ |
| author |
S. Bagchi R. Kanungo W. Horiuchi G. Hagen T.D. Morris S.R. Stroberg T. Suzuki F. Ameil J. Atkinson Y. Ayyad D. Cortina-Gil I. Dillmann A. Estradé A. Evdokimov F. Farinon H. Geissel G. Guastalla R. Janik S. Kaur R. Knöbel J. Kurcewicz Yu.A. Litvinov M. Marta M. Mostazo I. Mukha C. Nociforo H.J. Ong S. Pietri A. Prochazka C. Scheidenberger B. Sitar P. Strmen M. Takechi J. Tanaka Y. Tanaka I. Tanihata S. Terashima J. Vargas H. Weick J.S. Winfield |
| spellingShingle |
S. Bagchi R. Kanungo W. Horiuchi G. Hagen T.D. Morris S.R. Stroberg T. Suzuki F. Ameil J. Atkinson Y. Ayyad D. Cortina-Gil I. Dillmann A. Estradé A. Evdokimov F. Farinon H. Geissel G. Guastalla R. Janik S. Kaur R. Knöbel J. Kurcewicz Yu.A. Litvinov M. Marta M. Mostazo I. Mukha C. Nociforo H.J. Ong S. Pietri A. Prochazka C. Scheidenberger B. Sitar P. Strmen M. Takechi J. Tanaka Y. Tanaka I. Tanihata S. Terashima J. Vargas H. Weick J.S. Winfield Neutron skin and signature of the N = 14 shell gap found from measured proton radii of 17−22N Physics Letters B |
| author_facet |
S. Bagchi R. Kanungo W. Horiuchi G. Hagen T.D. Morris S.R. Stroberg T. Suzuki F. Ameil J. Atkinson Y. Ayyad D. Cortina-Gil I. Dillmann A. Estradé A. Evdokimov F. Farinon H. Geissel G. Guastalla R. Janik S. Kaur R. Knöbel J. Kurcewicz Yu.A. Litvinov M. Marta M. Mostazo I. Mukha C. Nociforo H.J. Ong S. Pietri A. Prochazka C. Scheidenberger B. Sitar P. Strmen M. Takechi J. Tanaka Y. Tanaka I. Tanihata S. Terashima J. Vargas H. Weick J.S. Winfield |
| author_sort |
S. Bagchi |
| title |
Neutron skin and signature of the N = 14 shell gap found from measured proton radii of 17−22N |
| title_short |
Neutron skin and signature of the N = 14 shell gap found from measured proton radii of 17−22N |
| title_full |
Neutron skin and signature of the N = 14 shell gap found from measured proton radii of 17−22N |
| title_fullStr |
Neutron skin and signature of the N = 14 shell gap found from measured proton radii of 17−22N |
| title_full_unstemmed |
Neutron skin and signature of the N = 14 shell gap found from measured proton radii of 17−22N |
| title_sort |
neutron skin and signature of the n = 14 shell gap found from measured proton radii of 17−22n |
| publisher |
Elsevier |
| series |
Physics Letters B |
| issn |
0370-2693 |
| publishDate |
2019-03-01 |
| description |
A thick neutron skin emerges from the first determination of root mean square radii of the proton distributions for 17−22N from charge changing cross section measurements around 900A MeV at GSI. Neutron halo effects are signalled for 22N from an increase in the proton and matter radii. The radii suggest an unconventional shell gap at N = 14 arising from the attractive proton–neutron tensor interaction, in good agreement with shell model calculations. Ab initio, in-medium similarity re-normalization group, calculations with a state-of-the-art chiral nucleon–nucleon and three-nucleon interaction reproduce well the data approaching the neutron drip-line isotopes but are challenged in explaining the complete isotopic trend of the radii. Keywords: Proton and matter radii, Neutron skin, Magic number, Shell model, Ab initio theory, Radioactive beams |
| url |
http://www.sciencedirect.com/science/article/pii/S0370269319300401 |
| work_keys_str_mv |
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doaj-6b25a2afb0f6463cba6bb430f008bc982020-11-25T00:35:57ZengElsevierPhysics Letters B0370-26932019-03-01790251256Neutron skin and signature of the N = 14 shell gap found from measured proton radii of 17−22NS. Bagchi0R. Kanungo1W. Horiuchi2G. Hagen3T.D. Morris4S.R. Stroberg5T. Suzuki6F. Ameil7J. Atkinson8Y. Ayyad9D. Cortina-Gil10I. Dillmann11A. Estradé12A. Evdokimov13F. Farinon14H. Geissel15G. Guastalla16R. Janik17S. Kaur18R. Knöbel19J. Kurcewicz20Yu.A. Litvinov21M. Marta22M. Mostazo23I. Mukha24C. Nociforo25H.J. Ong26S. Pietri27A. Prochazka28C. Scheidenberger29B. Sitar30P. Strmen31M. Takechi32J. Tanaka33Y. Tanaka34I. Tanihata35S. Terashima36J. Vargas37H. Weick38J.S. Winfield39Astronomy and Physics Department, Saint Mary's University, Halifax, NS B3H 3C3, Canada; GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany; Justus-Liebig University, 35392 Giessen, GermanyAstronomy and Physics Department, Saint Mary's University, Halifax, NS B3H 3C3, Canada; TRIUMF, Vancouver, BC V6T 4A3, Canada; Corresponding author.Department of Physics, Hokkaido University, Sapporo 060-0810, JapanPhysics Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA; Department of Physics and Astronomy, University of Tennessee, Knoxville, TN 37996, USAPhysics Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA; Department of Physics and Astronomy, University of Tennessee, Knoxville, TN 37996, USATRIUMF, Vancouver, BC V6T 4A3, CanadaDepartment of Physics, Nihon University, Setagaya-ku, Tokyo 156-8550, JapanGSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, GermanyAstronomy and Physics Department, Saint Mary's University, Halifax, NS B3H 3C3, CanadaUniversidad de Santiago de Compostela, E-15706 Santiago de Compostela, SpainUniversidad de Santiago de Compostela, E-15706 Santiago de Compostela, SpainGSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, GermanyAstronomy and Physics Department, Saint Mary's University, Halifax, NS B3H 3C3, Canada; GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, GermanyGSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, GermanyGSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, GermanyGSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany; Justus-Liebig University, 35392 Giessen, GermanyGSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, GermanyFaculty of Mathematics and Physics, Comenius University, 84215 Bratislava, SlovakiaAstronomy and Physics Department, Saint Mary's University, Halifax, NS B3H 3C3, Canada; Department of Physics and Atmospheric Science, Dalhousie University, Halifax, NS B3H 4R2, CanadaGSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, GermanyGSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, GermanyGSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, GermanyGSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, GermanyUniversidad de Santiago de Compostela, E-15706 Santiago de Compostela, SpainGSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, GermanyGSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, GermanyRCNP, Osaka University, Mihogaoka, Ibaraki, Osaka 567 0047, JapanGSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, GermanyGSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, GermanyGSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany; Justus-Liebig University, 35392 Giessen, GermanyFaculty of Mathematics and Physics, Comenius University, 84215 Bratislava, SlovakiaFaculty of Mathematics and Physics, Comenius University, 84215 Bratislava, SlovakiaGSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, GermanyRCNP, Osaka University, Mihogaoka, Ibaraki, Osaka 567 0047, JapanAstronomy and Physics Department, Saint Mary's University, Halifax, NS B3H 3C3, Canada; GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany; Justus-Liebig University, 35392 Giessen, GermanyRCNP, Osaka University, Mihogaoka, Ibaraki, Osaka 567 0047, Japan; School of Physics and Nuclear Energy Engineering and IRCNPC, Beihang University, Beijing 100191, ChinaSchool of Physics and Nuclear Energy Engineering and IRCNPC, Beihang University, Beijing 100191, ChinaUniversidad de Santiago de Compostela, E-15706 Santiago de Compostela, SpainGSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, GermanyGSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, GermanyA thick neutron skin emerges from the first determination of root mean square radii of the proton distributions for 17−22N from charge changing cross section measurements around 900A MeV at GSI. Neutron halo effects are signalled for 22N from an increase in the proton and matter radii. The radii suggest an unconventional shell gap at N = 14 arising from the attractive proton–neutron tensor interaction, in good agreement with shell model calculations. Ab initio, in-medium similarity re-normalization group, calculations with a state-of-the-art chiral nucleon–nucleon and three-nucleon interaction reproduce well the data approaching the neutron drip-line isotopes but are challenged in explaining the complete isotopic trend of the radii. Keywords: Proton and matter radii, Neutron skin, Magic number, Shell model, Ab initio theory, Radioactive beamshttp://www.sciencedirect.com/science/article/pii/S0370269319300401 |