Direct mass measurements of Cd isotopes show strong shell gap at N=82
A \(^{238}\)U projectile beam was used to create cadmium isotopes via abrasion-fission at 410 MeV/u in a beryllium target at the entrance of the in-flight separator FRS at GSI. The fission fragments were separated with the FRS and injected into the isochronous storage ring ESR for mass measurements....
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| creator | Knöbel, R Diwisch, M Bosch, F Boutin, D Chen, L Dimopoulou, C Dolinskii, A Franczak, B Franzke, B Geissel, H Hausmann, M Kozhuharov, C Kurcewicz, J Litvinova, S A Martínez-Pinedo, G Matoš, M Mazzocco, M Münzenberg, G Nakajima, S Nociforo, C Nolden, F Ohtsubo, T Ozawa, A Patyk, Z Plaß, W R Scheidenberger, C Stadlmann, J Steck, M Sun, B Suzuki, T Walker, P Weick, H M -R Wu Winkler, M Yamaguchi, T |
| description | A \(^{238}\)U projectile beam was used to create cadmium isotopes via abrasion-fission at 410 MeV/u in a beryllium target at the entrance of the in-flight separator FRS at GSI. The fission fragments were separated with the FRS and injected into the isochronous storage ring ESR for mass measurements. The Isochronous Mass Spectrometry (IMS) was performed under two different experimental conditions, with and without B\(\rho\)-tagging at the dispersive central focal plane of the FRS. In the experiment with B\(\rho\)-tagging the magnetic rigidity of the injected fragments was determined by an accuracy of \(2\times 10^{-4}\). A new method of data analysis, using a correlation matrix for the combined data set from both experiments, has provided mass values for 25 different isotopes for the first time. The high selectivity and sensitivity of the experiment and analysis has given access even to rare isotopes detected with a few atoms per week. In this letter we present for the \(^{129,130,131}\)Cd isotopes mass values directly measured for the first time. The Cd results clearly show a very pronounced shell effect at \(N=82\) which is in agreement with the conclusion from \(\gamma\)-ray spectroscopy of \(^{130}\)Cd and confirms the assumptions of modern shell-model calculations. |
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The fission fragments were separated with the FRS and injected into the isochronous storage ring ESR for mass measurements. The Isochronous Mass Spectrometry (IMS) was performed under two different experimental conditions, with and without B\(\rho\)-tagging at the dispersive central focal plane of the FRS. In the experiment with B\(\rho\)-tagging the magnetic rigidity of the injected fragments was determined by an accuracy of \(2\times 10^{-4}\). A new method of data analysis, using a correlation matrix for the combined data set from both experiments, has provided mass values for 25 different isotopes for the first time. The high selectivity and sensitivity of the experiment and analysis has given access even to rare isotopes detected with a few atoms per week. In this letter we present for the \(^{129,130,131}\)Cd isotopes mass values directly measured for the first time. The Cd results clearly show a very pronounced shell effect at \(N=82\) which is in agreement with the conclusion from \(\gamma\)-ray spectroscopy of \(^{130}\)Cd and confirms the assumptions of modern shell-model calculations.</description><identifier>EISSN: 2331-8422</identifier><language>eng</language><publisher>Ithaca: Cornell University Library, arXiv.org</publisher><subject>Abrasion ; Beryllium ; Cadmium isotopes ; Correlation analysis ; Data analysis ; Fission ; Focal plane ; Fragments ; Magnetic rigidity ; Marking ; Mass spectrometry ; Projectiles ; Selectivity ; Sensitivity analysis ; Separators</subject><ispartof>arXiv.org, 2015-07</ispartof><rights>2015. This work is published under http://arxiv.org/licenses/nonexclusive-distrib/1.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.</rights><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>777,781</link.rule.ids></links><search><creatorcontrib>Knöbel, R</creatorcontrib><creatorcontrib>Diwisch, M</creatorcontrib><creatorcontrib>Bosch, F</creatorcontrib><creatorcontrib>Boutin, D</creatorcontrib><creatorcontrib>Chen, L</creatorcontrib><creatorcontrib>Dimopoulou, C</creatorcontrib><creatorcontrib>Dolinskii, A</creatorcontrib><creatorcontrib>Franczak, B</creatorcontrib><creatorcontrib>Franzke, B</creatorcontrib><creatorcontrib>Geissel, H</creatorcontrib><creatorcontrib>Hausmann, M</creatorcontrib><creatorcontrib>Kozhuharov, C</creatorcontrib><creatorcontrib>Kurcewicz, J</creatorcontrib><creatorcontrib>Litvinova, S A</creatorcontrib><creatorcontrib>Martínez-Pinedo, G</creatorcontrib><creatorcontrib>Matoš, M</creatorcontrib><creatorcontrib>Mazzocco, M</creatorcontrib><creatorcontrib>Münzenberg, G</creatorcontrib><creatorcontrib>Nakajima, S</creatorcontrib><creatorcontrib>Nociforo, C</creatorcontrib><creatorcontrib>Nolden, F</creatorcontrib><creatorcontrib>Ohtsubo, T</creatorcontrib><creatorcontrib>Ozawa, A</creatorcontrib><creatorcontrib>Patyk, Z</creatorcontrib><creatorcontrib>Plaß, W R</creatorcontrib><creatorcontrib>Scheidenberger, C</creatorcontrib><creatorcontrib>Stadlmann, J</creatorcontrib><creatorcontrib>Steck, M</creatorcontrib><creatorcontrib>Sun, B</creatorcontrib><creatorcontrib>Suzuki, T</creatorcontrib><creatorcontrib>Walker, P</creatorcontrib><creatorcontrib>Weick, H</creatorcontrib><creatorcontrib>M -R Wu</creatorcontrib><creatorcontrib>Winkler, M</creatorcontrib><creatorcontrib>Yamaguchi, T</creatorcontrib><title>Direct mass measurements of Cd isotopes show strong shell gap at N=82</title><title>arXiv.org</title><description>A \(^{238}\)U projectile beam was used to create cadmium isotopes via abrasion-fission at 410 MeV/u in a beryllium target at the entrance of the in-flight separator FRS at GSI. The fission fragments were separated with the FRS and injected into the isochronous storage ring ESR for mass measurements. The Isochronous Mass Spectrometry (IMS) was performed under two different experimental conditions, with and without B\(\rho\)-tagging at the dispersive central focal plane of the FRS. In the experiment with B\(\rho\)-tagging the magnetic rigidity of the injected fragments was determined by an accuracy of \(2\times 10^{-4}\). A new method of data analysis, using a correlation matrix for the combined data set from both experiments, has provided mass values for 25 different isotopes for the first time. The high selectivity and sensitivity of the experiment and analysis has given access even to rare isotopes detected with a few atoms per week. In this letter we present for the \(^{129,130,131}\)Cd isotopes mass values directly measured for the first time. The Cd results clearly show a very pronounced shell effect at \(N=82\) which is in agreement with the conclusion from \(\gamma\)-ray spectroscopy of \(^{130}\)Cd and confirms the assumptions of modern shell-model calculations.</description><subject>Abrasion</subject><subject>Beryllium</subject><subject>Cadmium isotopes</subject><subject>Correlation analysis</subject><subject>Data analysis</subject><subject>Fission</subject><subject>Focal plane</subject><subject>Fragments</subject><subject>Magnetic rigidity</subject><subject>Marking</subject><subject>Mass spectrometry</subject><subject>Projectiles</subject><subject>Selectivity</subject><subject>Sensitivity analysis</subject><subject>Separators</subject><issn>2331-8422</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2015</creationdate><recordtype>article</recordtype><sourceid>ABUWG</sourceid><sourceid>AFKRA</sourceid><sourceid>AZQEC</sourceid><sourceid>BENPR</sourceid><sourceid>CCPQU</sourceid><sourceid>DWQXO</sourceid><recordid>eNqNik0LgkAQQJcgSMr_MNBZ2Gb9unQyo1On7rLkaIo6trPS389DP6DTe_DeRgVozCnKY8SdCkV6rTWmGSaJCVR56Rw9PYxWBEaysjgaafIC3EBRQyfseSYBefEHxDue2tVpGKC1M1gP93OOB7Vt7CAU_rhXx2v5KG7R7Pi9kPiq58VNa6pQ5wbjNEu1-e_6Ai9ZOgg</recordid><startdate>20150716</startdate><enddate>20150716</enddate><creator>Knöbel, R</creator><creator>Diwisch, M</creator><creator>Bosch, F</creator><creator>Boutin, D</creator><creator>Chen, L</creator><creator>Dimopoulou, C</creator><creator>Dolinskii, A</creator><creator>Franczak, B</creator><creator>Franzke, B</creator><creator>Geissel, H</creator><creator>Hausmann, M</creator><creator>Kozhuharov, C</creator><creator>Kurcewicz, J</creator><creator>Litvinova, S A</creator><creator>Martínez-Pinedo, G</creator><creator>Matoš, M</creator><creator>Mazzocco, M</creator><creator>Münzenberg, G</creator><creator>Nakajima, S</creator><creator>Nociforo, C</creator><creator>Nolden, F</creator><creator>Ohtsubo, T</creator><creator>Ozawa, A</creator><creator>Patyk, Z</creator><creator>Plaß, W R</creator><creator>Scheidenberger, C</creator><creator>Stadlmann, J</creator><creator>Steck, M</creator><creator>Sun, B</creator><creator>Suzuki, T</creator><creator>Walker, P</creator><creator>Weick, H</creator><creator>M -R Wu</creator><creator>Winkler, M</creator><creator>Yamaguchi, T</creator><general>Cornell University Library, arXiv.org</general><scope>8FE</scope><scope>8FG</scope><scope>ABJCF</scope><scope>ABUWG</scope><scope>AFKRA</scope><scope>AZQEC</scope><scope>BENPR</scope><scope>BGLVJ</scope><scope>CCPQU</scope><scope>DWQXO</scope><scope>HCIFZ</scope><scope>L6V</scope><scope>M7S</scope><scope>PIMPY</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PRINS</scope><scope>PTHSS</scope></search><sort><creationdate>20150716</creationdate><title>Direct mass measurements of Cd isotopes show strong shell gap at N=82</title><author>Knöbel, R ; 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The fission fragments were separated with the FRS and injected into the isochronous storage ring ESR for mass measurements. The Isochronous Mass Spectrometry (IMS) was performed under two different experimental conditions, with and without B\(\rho\)-tagging at the dispersive central focal plane of the FRS. In the experiment with B\(\rho\)-tagging the magnetic rigidity of the injected fragments was determined by an accuracy of \(2\times 10^{-4}\). A new method of data analysis, using a correlation matrix for the combined data set from both experiments, has provided mass values for 25 different isotopes for the first time. The high selectivity and sensitivity of the experiment and analysis has given access even to rare isotopes detected with a few atoms per week. In this letter we present for the \(^{129,130,131}\)Cd isotopes mass values directly measured for the first time. The Cd results clearly show a very pronounced shell effect at \(N=82\) which is in agreement with the conclusion from \(\gamma\)-ray spectroscopy of \(^{130}\)Cd and confirms the assumptions of modern shell-model calculations.</abstract><cop>Ithaca</cop><pub>Cornell University Library, arXiv.org</pub><oa>free_for_read</oa></addata></record> |
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| subjects | Abrasion Beryllium Cadmium isotopes Correlation analysis Data analysis Fission Focal plane Fragments Magnetic rigidity Marking Mass spectrometry Projectiles Selectivity Sensitivity analysis Separators |
| title | Direct mass measurements of Cd isotopes show strong shell gap at N=82 |
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