Role of the Δ Resonance in the Population of a Four-Nucleon State in the 56Fe → 54Fe Reaction at Relativistic Energies

Zs Podolyák; C. M. Shand; Natasa Lalovic; J. Gerl; D. Rudolph; T. Alexander; P. Boutachkov; M. L. Cortés; M. Górska; I. Kojouharov; N. Kurz; C. Louchart; E. Merchán; C. Michelagnoli; R. M. Pérez-Vidal; S. Pietri; D. Ralet; M. Reese; H. Schaffner; Ch Stahl; H. Weick; F. Ameil; G. De Angelis; T. Arici; R. Carroll; Zs Dombrádi; A. Gadea; P. Golubev; M. Lettmann; C. Lizarazo; D. Mahboub; H. Pai; Z. Patel; N. Pietralla; P. H. Regan; L. G. Sarmiento; O. Wieland; E. Wilson; B. Birkenbach; B. Bruyneel; I. Burrows; L. Charles; E. Clément; F. C L Crespi; D. M. Cullen; P. Désesquelles; J. Eberth; V. González; T. Habermann; L. Harkness-Brennan; H. Hess; D. S. Judson; A. Jungclaus; W. Korten; M. Labiche; A. Maj; D. Mengoni; D. R. Napoli; A. Pullia; B. Quintana; G. Rainovski; P. Reiter; M. D. Salsac; E. Sanchis; J. J. Valiente Dóbon

doi:10.1103/PhysRevLett.117.222302

Role of the Δ Resonance in the Population of a Four-Nucleon State in the 56Fe → 54Fe Reaction at Relativistic Energies

Zs Podolyák, C. M. Shand, Natasa Lalovic, J. Gerl, D. Rudolph, T. Alexander, P. Boutachkov, M. L. Cortés, M. Górska, I. Kojouharov, N. Kurz, C. Louchart, E. Merchán, C. Michelagnoli, R. M. Pérez-Vidal, S. Pietri, D. Ralet, M. Reese, H. Schaffner, Ch StahlH. Weick, F. Ameil, G. De Angelis, T. Arici, R. Carroll, Zs Dombrádi, A. Gadea, P. Golubev, M. Lettmann, C. Lizarazo, D. Mahboub, H. Pai, Z. Patel, N. Pietralla, P. H. Regan, L. G. Sarmiento, O. Wieland, E. Wilson, B. Birkenbach, B. Bruyneel, I. Burrows, L. Charles, E. Clément, F. C L Crespi, D. M. Cullen, P. Désesquelles, J. Eberth, V. González, T. Habermann, L. Harkness-Brennan, H. Hess, D. S. Judson, A. Jungclaus, W. Korten, M. Labiche, A. Maj, D. Mengoni, D. R. Napoli, A. Pullia, B. Quintana, G. Rainovski, P. Reiter, M. D. Salsac, E. Sanchis, J. J. Valiente Dóbon

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Abstract

The Fe54 nucleus was populated from a 56Fe beam impinging on a Be target with an energy of E/A=500 MeV. The internal decay via γ-ray emission of the 10+ metastable state was observed. As the structure of this isomeric state has to involve at least four unpaired nucleons, it cannot be populated in a simple two-neutron removal reaction from the 56Fe ground state. The isomeric state was produced in the low-momentum (-energy) tail of the parallel momentum (energy) distribution of 54Fe, suggesting that it was populated via the decay of the Δ0 resonance into a proton. This process allows the population of four-nucleon states, such as the observed isomer. Therefore, it is concluded that the observation of this 10+ metastable state in 54Fe is a consequence of the quark structure of the nucleons.

Original language	English
Article number	222302
Number of pages	5
Journal	Physical Review Letters
Volume	117
Issue number	22
DOIs	https://doi.org/10.1103/PhysRevLett.117.222302
Publication status	Published - 2016 Nov 23

Subject classification (UKÄ)

Subatomic Physics

Free keywords

isomer decay
gamma-ray spectroscopy
relativistic projectile fragmentation

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10.1103/PhysRevLett.117.222302

PhysRevLett.117.222302Final published version, 579 KBLicence: Unspecified

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Podolyák, Z., Shand, C. M., Lalovic, N., Gerl, J., Rudolph, D., Alexander, T., Boutachkov, P., Cortés, M. L., Górska, M., Kojouharov, I., Kurz, N., Louchart, C., Merchán, E., Michelagnoli, C., Pérez-Vidal, R. M., Pietri, S., Ralet, D., Reese, M., Schaffner, H., ... Valiente Dóbon, J. J. (2016). Role of the Δ Resonance in the Population of a Four-Nucleon State in the 56Fe → 54Fe Reaction at Relativistic Energies. Physical Review Letters, 117(22), Article 222302. https://doi.org/10.1103/PhysRevLett.117.222302

@article{afcd1ed4feea44869c878b57b72c3a79,

title = "Role of the Δ Resonance in the Population of a Four-Nucleon State in the 56Fe → 54Fe Reaction at Relativistic Energies",

abstract = "The Fe54 nucleus was populated from a 56Fe beam impinging on a Be target with an energy of E/A=500 MeV. The internal decay via γ-ray emission of the 10+ metastable state was observed. As the structure of this isomeric state has to involve at least four unpaired nucleons, it cannot be populated in a simple two-neutron removal reaction from the 56Fe ground state. The isomeric state was produced in the low-momentum (-energy) tail of the parallel momentum (energy) distribution of 54Fe, suggesting that it was populated via the decay of the Δ0 resonance into a proton. This process allows the population of four-nucleon states, such as the observed isomer. Therefore, it is concluded that the observation of this 10+ metastable state in 54Fe is a consequence of the quark structure of the nucleons.",

keywords = "isomer decay, gamma-ray spectroscopy, relativistic projectile fragmentation",

author = "Zs Podoly{\'a}k and Shand, \{C. M.\} and Natasa Lalovic and J. Gerl and D. Rudolph and T. Alexander and P. Boutachkov and Cort{\'e}s, \{M. L.\} and M. G{\'o}rska and I. Kojouharov and N. Kurz and C. Louchart and E. Merch{\'a}n and C. Michelagnoli and P{\'e}rez-Vidal, \{R. M.\} and S. Pietri and D. Ralet and M. Reese and H. Schaffner and Ch Stahl and H. Weick and F. Ameil and \{De Angelis\}, G. and T. Arici and R. Carroll and Zs Dombr{\'a}di and A. Gadea and P. Golubev and M. Lettmann and C. Lizarazo and D. Mahboub and H. Pai and Z. Patel and N. Pietralla and Regan, \{P. H.\} and Sarmiento, \{L. G.\} and O. Wieland and E. Wilson and B. Birkenbach and B. Bruyneel and I. Burrows and L. Charles and E. Cl{\'e}ment and Crespi, \{F. C L\} and Cullen, \{D. M.\} and P. D{\'e}sesquelles and J. Eberth and V. Gonz{\'a}lez and T. Habermann and L. Harkness-Brennan and H. Hess and Judson, \{D. S.\} and A. Jungclaus and W. Korten and M. Labiche and A. Maj and D. Mengoni and Napoli, \{D. R.\} and A. Pullia and B. Quintana and G. Rainovski and P. Reiter and Salsac, \{M. D.\} and E. Sanchis and \{Valiente D{\'o}bon\}, \{J. J.\}",

year = "2016",

month = nov,

day = "23",

doi = "10.1103/PhysRevLett.117.222302",

language = "English",

volume = "117",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society",

number = "22",

}

Podolyák, Z, Shand, CM, Lalovic, N, Gerl, J, Rudolph, D, Alexander, T, Boutachkov, P, Cortés, ML, Górska, M, Kojouharov, I, Kurz, N, Louchart, C, Merchán, E, Michelagnoli, C, Pérez-Vidal, RM, Pietri, S, Ralet, D, Reese, M, Schaffner, H, Stahl, C, Weick, H, Ameil, F, De Angelis, G, Arici, T, Carroll, R, Dombrádi, Z, Gadea, A, Golubev, P, Lettmann, M, Lizarazo, C, Mahboub, D, Pai, H, Patel, Z, Pietralla, N, Regan, PH, Sarmiento, LG, Wieland, O, Wilson, E, Birkenbach, B, Bruyneel, B, Burrows, I, Charles, L, Clément, E, Crespi, FCL, Cullen, DM, Désesquelles, P, Eberth, J, González, V, Habermann, T, Harkness-Brennan, L, Hess, H, Judson, DS, Jungclaus, A, Korten, W, Labiche, M, Maj, A, Mengoni, D, Napoli, DR, Pullia, A, Quintana, B, Rainovski, G, Reiter, P, Salsac, MD, Sanchis, E & Valiente Dóbon, JJ 2016, 'Role of the Δ Resonance in the Population of a Four-Nucleon State in the 56Fe → 54Fe Reaction at Relativistic Energies', Physical Review Letters, vol. 117, no. 22, 222302. https://doi.org/10.1103/PhysRevLett.117.222302

TY - JOUR

T1 - Role of the Δ Resonance in the Population of a Four-Nucleon State in the 56Fe → 54Fe Reaction at Relativistic Energies

AU - Podolyák, Zs

AU - Shand, C. M.

AU - Lalovic, Natasa

AU - Gerl, J.

AU - Rudolph, D.

AU - Alexander, T.

AU - Boutachkov, P.

AU - Cortés, M. L.

AU - Górska, M.

AU - Kojouharov, I.

AU - Kurz, N.

AU - Louchart, C.

AU - Merchán, E.

AU - Michelagnoli, C.

AU - Pérez-Vidal, R. M.

AU - Pietri, S.

AU - Ralet, D.

AU - Reese, M.

AU - Schaffner, H.

AU - Stahl, Ch

AU - Weick, H.

AU - Ameil, F.

AU - De Angelis, G.

AU - Arici, T.

AU - Carroll, R.

AU - Dombrádi, Zs

AU - Gadea, A.

AU - Golubev, P.

AU - Lettmann, M.

AU - Lizarazo, C.

AU - Mahboub, D.

AU - Pai, H.

AU - Patel, Z.

AU - Pietralla, N.

AU - Regan, P. H.

AU - Sarmiento, L. G.

AU - Wieland, O.

AU - Wilson, E.

AU - Birkenbach, B.

AU - Bruyneel, B.

AU - Burrows, I.

AU - Charles, L.

AU - Clément, E.

AU - Crespi, F. C L

AU - Cullen, D. M.

AU - Désesquelles, P.

AU - Eberth, J.

AU - González, V.

AU - Habermann, T.

AU - Harkness-Brennan, L.

AU - Hess, H.

AU - Judson, D. S.

AU - Jungclaus, A.

AU - Korten, W.

AU - Labiche, M.

AU - Maj, A.

AU - Mengoni, D.

AU - Napoli, D. R.

AU - Pullia, A.

AU - Quintana, B.

AU - Rainovski, G.

AU - Reiter, P.

AU - Salsac, M. D.

AU - Sanchis, E.

AU - Valiente Dóbon, J. J.

PY - 2016/11/23

Y1 - 2016/11/23

N2 - The Fe54 nucleus was populated from a 56Fe beam impinging on a Be target with an energy of E/A=500 MeV. The internal decay via γ-ray emission of the 10+ metastable state was observed. As the structure of this isomeric state has to involve at least four unpaired nucleons, it cannot be populated in a simple two-neutron removal reaction from the 56Fe ground state. The isomeric state was produced in the low-momentum (-energy) tail of the parallel momentum (energy) distribution of 54Fe, suggesting that it was populated via the decay of the Δ0 resonance into a proton. This process allows the population of four-nucleon states, such as the observed isomer. Therefore, it is concluded that the observation of this 10+ metastable state in 54Fe is a consequence of the quark structure of the nucleons.

AB - The Fe54 nucleus was populated from a 56Fe beam impinging on a Be target with an energy of E/A=500 MeV. The internal decay via γ-ray emission of the 10+ metastable state was observed. As the structure of this isomeric state has to involve at least four unpaired nucleons, it cannot be populated in a simple two-neutron removal reaction from the 56Fe ground state. The isomeric state was produced in the low-momentum (-energy) tail of the parallel momentum (energy) distribution of 54Fe, suggesting that it was populated via the decay of the Δ0 resonance into a proton. This process allows the population of four-nucleon states, such as the observed isomer. Therefore, it is concluded that the observation of this 10+ metastable state in 54Fe is a consequence of the quark structure of the nucleons.

KW - isomer decay

KW - gamma-ray spectroscopy

KW - relativistic projectile fragmentation

UR - https://www.scopus.com/pages/publications/84999635744

U2 - 10.1103/PhysRevLett.117.222302

DO - 10.1103/PhysRevLett.117.222302

M3 - Article

C2 - 27925748

AN - SCOPUS:84999635744

SN - 0031-9007

VL - 117

JO - Physical Review Letters

JF - Physical Review Letters

IS - 22

M1 - 222302

ER -

Role of the Δ Resonance in the Population of a Four-Nucleon State in the 56Fe → 54Fe Reaction at Relativistic Energies

Abstract

Subject classification (UKÄ)

Free keywords

Access to Document

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Fingerprint

Nuclear Structure Studies near 208Pb and γ-ray Imaging Techniques

Role Of The Delta Resonance In The Population Of Excited States In High-Energy Reactions

FAIR-NUSTAR: HISPEC-DESPEC experiment & Super-FRS contributions

Nuclear Structure at the Limits: Isotope-selective Spectroscopy

Nuclear Structure Studies near 208Pb and gamma-ray Imaging Techniques

PRESPEC-AGATA Campaign Spokesperson

Swedish delegate PRESPEC Steering Committee

Cite this

Role of the Δ Resonance in the Population of a Four-Nucleon State in the 56Fe → 54Fe Reaction at Relativistic Energies

Abstract

Subject classification (UKÄ)

Free keywords

Access to Document

Other files and links

Fingerprint

Research output

Nuclear Structure Studies near 208Pb and γ-ray Imaging Techniques

Role Of The Delta Resonance In The Population Of Excited States In High-Energy Reactions

Projects

FAIR-NUSTAR: HISPEC-DESPEC experiment & Super-FRS contributions

Nuclear Structure at the Limits: Isotope-selective Spectroscopy

Nuclear Structure Studies near 208Pb and gamma-ray Imaging Techniques

Activities

PRESPEC-AGATA Campaign Spokesperson

Swedish delegate PRESPEC Steering Committee

Cite this