Migration of nuclear shell gaps studied in the d(Ne24,pγ)Ne25 reaction

W. N. Catford; C. N. Timis; R. C. Lemmon; M. Labiche; N. A. Orr; B. Fernández-Domínguez; R. Chapman; M. Freer; M. Chartier; H. Savajols; M. Rejmund; N. L. Achouri; N. Amzal; N. I. Ashwood; T. D. Baldwin; M. Burns; L. Caballero; J. M. Casadjian; N. Curtis; G. De France; W. Gelletly; X. Liang; S. D. Pain; V. P.E. Pucknell; B. Rubio; O. Sorlin; K. Spohr; Ch Theisen; D. D. Warner

doi:10.1103/PhysRevLett.104.192501

Migration of nuclear shell gaps studied in the d(Ne24,pγ)Ne25 reaction

W. N. Catford, C. N. Timis, R. C. Lemmon, M. Labiche, N. A. Orr, B. Fernández-Domínguez, R. Chapman, M. Freer, M. Chartier, H. Savajols, M. Rejmund, N. L. Achouri, N. Amzal, N. I. Ashwood, T. D. Baldwin, M. Burns, L. Caballero, J. M. Casadjian, N. Curtis, G. De FranceW. Gelletly, X. Liang, S. D. Pain, V. P.E. Pucknell, B. Rubio, O. Sorlin, K. Spohr, Ch Theisen, D. D. Warner

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Abstract

The transfer of neutrons onto Ne24 has been measured using a reaccelerated radioactive beam of Ne24 to study the (d,p) reaction in inverse kinematics. The unusual raising of the first 3/2⁺ level in Ne25 and its significance in terms of the migration of the neutron magic number from N=20 to N=16 is put on a firm footing by confirmation of this state's identity. The raised 3/2 ⁺ level is observed simultaneously with the intruder negative parity 7/2^- and 3/2^- levels, providing evidence for the reduction in the N=20 gap. The coincident gamma-ray decays allowed the assignment of spins as well as the transferred orbital angular momentum. The excitation energy of the 3/2⁺ state shows that the established USD shell model breaks down well within the sd model space and requires a revised treatment of the proton-neutron monopole interaction.

Original language	English
Article number	192501
Journal	Physical Review Letters
Volume	104
Issue number	19
DOIs	https://doi.org/10.1103/PhysRevLett.104.192501
State	Published - May 10 2010
Externally published	Yes

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Catford, W. N., Timis, C. N., Lemmon, R. C., Labiche, M., Orr, N. A., Fernández-Domínguez, B., Chapman, R., Freer, M., Chartier, M., Savajols, H., Rejmund, M., Achouri, N. L., Amzal, N., Ashwood, N. I., Baldwin, T. D., Burns, M., Caballero, L., Casadjian, J. M., Curtis, N., ... Warner, D. D. (2010). Migration of nuclear shell gaps studied in the d(Ne24,pγ)Ne25 reaction. Physical Review Letters, 104(19), Article 192501. https://doi.org/10.1103/PhysRevLett.104.192501

@article{752d1c458ac04478a880ab99d20f49b0,

title = "Migration of nuclear shell gaps studied in the d(Ne24,pγ)Ne25 reaction",

abstract = "The transfer of neutrons onto Ne24 has been measured using a reaccelerated radioactive beam of Ne24 to study the (d,p) reaction in inverse kinematics. The unusual raising of the first 3/2+ level in Ne25 and its significance in terms of the migration of the neutron magic number from N=20 to N=16 is put on a firm footing by confirmation of this state's identity. The raised 3/2 + level is observed simultaneously with the intruder negative parity 7/2- and 3/2- levels, providing evidence for the reduction in the N=20 gap. The coincident gamma-ray decays allowed the assignment of spins as well as the transferred orbital angular momentum. The excitation energy of the 3/2+ state shows that the established USD shell model breaks down well within the sd model space and requires a revised treatment of the proton-neutron monopole interaction.",

author = "Catford, {W. N.} and Timis, {C. N.} and Lemmon, {R. C.} and M. Labiche and Orr, {N. A.} and B. Fern{\'a}ndez-Dom{\'i}nguez and R. Chapman and M. Freer and M. Chartier and H. Savajols and M. Rejmund and Achouri, {N. L.} and N. Amzal and Ashwood, {N. I.} and Baldwin, {T. D.} and M. Burns and L. Caballero and Casadjian, {J. M.} and N. Curtis and {De France}, G. and W. Gelletly and X. Liang and Pain, {S. D.} and Pucknell, {V. P.E.} and B. Rubio and O. Sorlin and K. Spohr and Ch Theisen and Warner, {D. D.}",

year = "2010",

month = may,

day = "10",

doi = "10.1103/PhysRevLett.104.192501",

language = "English",

volume = "104",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society",

number = "19",

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Catford, WN, Timis, CN, Lemmon, RC, Labiche, M, Orr, NA, Fernández-Domínguez, B, Chapman, R, Freer, M, Chartier, M, Savajols, H, Rejmund, M, Achouri, NL, Amzal, N, Ashwood, NI, Baldwin, TD, Burns, M, Caballero, L, Casadjian, JM, Curtis, N, De France, G, Gelletly, W, Liang, X, Pain, SD, Pucknell, VPE, Rubio, B, Sorlin, O, Spohr, K, Theisen, C & Warner, DD 2010, 'Migration of nuclear shell gaps studied in the d(Ne24,pγ)Ne25 reaction', Physical Review Letters, vol. 104, no. 19, 192501. https://doi.org/10.1103/PhysRevLett.104.192501

TY - JOUR

T1 - Migration of nuclear shell gaps studied in the d(Ne24,pγ)Ne25 reaction

AU - Catford, W. N.

AU - Timis, C. N.

AU - Lemmon, R. C.

AU - Labiche, M.

AU - Orr, N. A.

AU - Fernández-Domínguez, B.

AU - Chapman, R.

AU - Freer, M.

AU - Chartier, M.

AU - Savajols, H.

AU - Rejmund, M.

AU - Achouri, N. L.

AU - Amzal, N.

AU - Ashwood, N. I.

AU - Baldwin, T. D.

AU - Burns, M.

AU - Caballero, L.

AU - Casadjian, J. M.

AU - Curtis, N.

AU - De France, G.

AU - Gelletly, W.

AU - Liang, X.

AU - Pain, S. D.

AU - Pucknell, V. P.E.

AU - Rubio, B.

AU - Sorlin, O.

AU - Spohr, K.

AU - Theisen, Ch

AU - Warner, D. D.

PY - 2010/5/10

Y1 - 2010/5/10

N2 - The transfer of neutrons onto Ne24 has been measured using a reaccelerated radioactive beam of Ne24 to study the (d,p) reaction in inverse kinematics. The unusual raising of the first 3/2+ level in Ne25 and its significance in terms of the migration of the neutron magic number from N=20 to N=16 is put on a firm footing by confirmation of this state's identity. The raised 3/2 + level is observed simultaneously with the intruder negative parity 7/2- and 3/2- levels, providing evidence for the reduction in the N=20 gap. The coincident gamma-ray decays allowed the assignment of spins as well as the transferred orbital angular momentum. The excitation energy of the 3/2+ state shows that the established USD shell model breaks down well within the sd model space and requires a revised treatment of the proton-neutron monopole interaction.

AB - The transfer of neutrons onto Ne24 has been measured using a reaccelerated radioactive beam of Ne24 to study the (d,p) reaction in inverse kinematics. The unusual raising of the first 3/2+ level in Ne25 and its significance in terms of the migration of the neutron magic number from N=20 to N=16 is put on a firm footing by confirmation of this state's identity. The raised 3/2 + level is observed simultaneously with the intruder negative parity 7/2- and 3/2- levels, providing evidence for the reduction in the N=20 gap. The coincident gamma-ray decays allowed the assignment of spins as well as the transferred orbital angular momentum. The excitation energy of the 3/2+ state shows that the established USD shell model breaks down well within the sd model space and requires a revised treatment of the proton-neutron monopole interaction.

UR - http://www.scopus.com/inward/record.url?scp=77952393474&partnerID=8YFLogxK

U2 - 10.1103/PhysRevLett.104.192501

DO - 10.1103/PhysRevLett.104.192501

M3 - Article

AN - SCOPUS:77952393474

SN - 0031-9007

VL - 104

JO - Physical Review Letters

JF - Physical Review Letters

IS - 19

M1 - 192501

ER -

Migration of nuclear shell gaps studied in the d(Ne24,pγ)Ne25 reaction

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