Neutron radioactivity—Lifetime measurements of neutron-unbound states.
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| Title: | Neutron radioactivity—Lifetime measurements of neutron-unbound states. |
|---|---|
| Authors: | Kahlbow, J.1,2 jkahlbow@ikp.tu-darmstadt.de, Caesar, C.1,2 c.caesar@gsi.de, Aumann, T.1,2 t.aumann@gsi.de, Panin, V.3, Paschalis, S.1, Scheit, H.1, Simon, H.2 |
| Source: | Nuclear Instruments & Methods in Physics Research Section A. Sep2017, Vol. 866, p265-271. 7p. |
| Subjects: | Radioactivity, Neutron emission, Radioactive decay, Monte Carlo method, Spectrum analysis, Sensitivity analysis |
| Abstract: | A new technique to measure the lifetime τ of a neutron-radioactive nucleus that decays in-flight via neutron emission is presented and demonstrated utilizing MonteCarlo simulations. The method is based on the production of the neutron-unbound nucleus in a target, which at the same time slows down the produced nucleus and the residual nucleus after (multi-) neutron emission. The spectrum of the velocity difference of neutron(s) and the residual nucleus has a characteristic shape, that allows to extract the lifetime. If the decay happens outside the target there will be a peak in the spectrum, while events where the decay is in the target show a broad flat distribution due to the continuous slowing down of the residual nucleus. The method itself and the analysis procedure are discussed in detail for the specific candidate 26 O. A stack of targets with decreasing target thicknesses can expand the measurable lifetime range and improve the sensitivity by increasing the ratio between decays outside and inside the target. The simulations indicate a lower limit of measurable lifetime τ ∼ 0 . 2 ps for the given conditions. [ABSTRACT FROM AUTHOR] |
| Copyright of Nuclear Instruments & Methods in Physics Research Section A is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
| FullText | Text: Availability: 0 |
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| Header | DbId: egs DbLabel: Engineering Source An: 124721581 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Neutron radioactivity—Lifetime measurements of neutron-unbound states. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Kahlbow%2C+J%2E%22">Kahlbow, J.</searchLink><relatesTo>1,2</relatesTo><i> jkahlbow@ikp.tu-darmstadt.de</i><br /><searchLink fieldCode="AR" term="%22Caesar%2C+C%2E%22">Caesar, C.</searchLink><relatesTo>1,2</relatesTo><i> c.caesar@gsi.de</i><br /><searchLink fieldCode="AR" term="%22Aumann%2C+T%2E%22">Aumann, T.</searchLink><relatesTo>1,2</relatesTo><i> t.aumann@gsi.de</i><br /><searchLink fieldCode="AR" term="%22Panin%2C+V%2E%22">Panin, V.</searchLink><relatesTo>3</relatesTo><br /><searchLink fieldCode="AR" term="%22Paschalis%2C+S%2E%22">Paschalis, S.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Scheit%2C+H%2E%22">Scheit, H.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Simon%2C+H%2E%22">Simon, H.</searchLink><relatesTo>2</relatesTo> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Nuclear+Instruments+%26+Methods+in+Physics+Research+Section+A%22">Nuclear Instruments & Methods in Physics Research Section A</searchLink>. Sep2017, Vol. 866, p265-271. 7p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Radioactivity%22">Radioactivity</searchLink><br /><searchLink fieldCode="DE" term="%22Neutron+emission%22">Neutron emission</searchLink><br /><searchLink fieldCode="DE" term="%22Radioactive+decay%22">Radioactive decay</searchLink><br /><searchLink fieldCode="DE" term="%22Monte+Carlo+method%22">Monte Carlo method</searchLink><br /><searchLink fieldCode="DE" term="%22Spectrum+analysis%22">Spectrum analysis</searchLink><br /><searchLink fieldCode="DE" term="%22Sensitivity+analysis%22">Sensitivity analysis</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: A new technique to measure the lifetime τ of a neutron-radioactive nucleus that decays in-flight via neutron emission is presented and demonstrated utilizing MonteCarlo simulations. The method is based on the production of the neutron-unbound nucleus in a target, which at the same time slows down the produced nucleus and the residual nucleus after (multi-) neutron emission. The spectrum of the velocity difference of neutron(s) and the residual nucleus has a characteristic shape, that allows to extract the lifetime. If the decay happens outside the target there will be a peak in the spectrum, while events where the decay is in the target show a broad flat distribution due to the continuous slowing down of the residual nucleus. The method itself and the analysis procedure are discussed in detail for the specific candidate 26 O. A stack of targets with decreasing target thicknesses can expand the measurable lifetime range and improve the sensitivity by increasing the ratio between decays outside and inside the target. The simulations indicate a lower limit of measurable lifetime τ ∼ 0 . 2 ps for the given conditions. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Nuclear Instruments & Methods in Physics Research Section A is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1016/j.nima.2017.06.002 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 7 StartPage: 265 Subjects: – SubjectFull: Radioactivity Type: general – SubjectFull: Neutron emission Type: general – SubjectFull: Radioactive decay Type: general – SubjectFull: Monte Carlo method Type: general – SubjectFull: Spectrum analysis Type: general – SubjectFull: Sensitivity analysis Type: general Titles: – TitleFull: Neutron radioactivity—Lifetime measurements of neutron-unbound states. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Kahlbow, J. – PersonEntity: Name: NameFull: Caesar, C. – PersonEntity: Name: NameFull: Aumann, T. – PersonEntity: Name: NameFull: Panin, V. – PersonEntity: Name: NameFull: Paschalis, S. – PersonEntity: Name: NameFull: Scheit, H. – PersonEntity: Name: NameFull: Simon, H. IsPartOfRelationships: – BibEntity: Dates: – D: 11 M: 09 Text: Sep2017 Type: published Y: 2017 Identifiers: – Type: issn-print Value: 01689002 Numbering: – Type: volume Value: 866 Titles: – TitleFull: Nuclear Instruments & Methods in Physics Research Section A Type: main |
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