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51. Reaction mechanisms in 24Mg+12C and 32S+24Mg

Author

Beck, C., Zafra, A. Sanchez i, Papka, P., Thummerer, S., Azaiez, F., Courtin, S., Curien, D., Dorvaux, O., Lebhertz, D., Nourreddine, A., Rousseau, M., von Oertzen, W., Gebauer, B., Kokalova, Tz., Wheldon, C., de Angelis, G., Gadea, A., Lenzi, S., Napoli, D. R., Szilner, S., Catford, W. n., Jenkins, D. G., and Royer, G.

Subjects
Nuclear Experiment
Abstract

The occurence of "exotic" shapes in light N=Z alpha-like nuclei is investigated for 24Mg+12C and 32S+24Mg. Various approaches of superdeformed and hyperdeformed bands associated with quasimolecular resonant structures with low spin are presented. For both reactions, exclusive data were collected with the Binary Reaction Spectrometer in coincidence with EUROBALL IV installed at the VIVITRON Tandem facility of Strasbourg. Specific structures with large deformation were selectively populated in binary reactions and their associated $\gamma$-decays studied. The analysis of the binary and ternary reaction channels is discussed., Comment: 7 pages, 4 figures, Paper presented at the Fusion08 International Conference on New Aspects of Heavy Ion Collisions Near the Coulomb Barrier, Chicago. Proceedings to be published by AIP Conference Proceedings Illinois, USA, September 22-26, 2008

Published
2008
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52. Single-Proton Removal Reaction Study of 16B

Author

Lecouey, J. -L., Orr, N. A., Marques, F. M., Achouri, N. L., Angelique, J. -C., Brown, B. A., Catford, W. N., Clarke, N. M., Freer, M., Fulton, B. R., Grevy, S., Hanappe, F., Jones, K. L., Labiche, M., Lemmon, R. C., Ninane, A., Sauvan, E., Spohr, K. M., and Stuttge, L.

Subjects
Nuclear Experiment
Abstract

The low-lying level structure of the unbound system $^{16}$B has been investigated via single-proton removal from a 35 MeV/nucleon $^{17}$C beam. The coincident detection of the beam velocity $^{15}$B fragment and neutron allowed the relative energy of the in-flight decay of $^{16}$B to be reconstructed. The resulting spectrum exhibited a narrow peak some 85 keV above threshold. It is argued that this feature corresponds to a very narrow ($\Gamma \ll $100 keV) resonance, or an unresolved multiplet, with a dominant $\pi (p_{3/2})^{-1} \otimes \nu (d_{5/2}^3)_{J=3/2^+}$ + $\pi (p_{3/2})^{-1} \otimes \nu (d_{5/2}^2,s_{1/2})_{J=3/2^+}$ configuration which decays by d-wave neutron emission., Comment: 16 pages, 5 figures, 1 table, submitted to Phys. Lett. B

Published
2008
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53. B(E1) Strengths from Coulomb Excitation of 11Be

Author

Summers, N. C., Pain, S. D., Orr, N. A., Catford, W. N., Angelique, J. C., Ashwood, N. I., Bouchat, V., Clarke, N. M., Curtis, N., Freer, M., Fulton, B. R., Hanappe, F., Labiche, M., Lecouey, J. L., Lemmon, R. C., Mahboub, D., Ninane, A., Normand, G., Nunes, F. M., Soic, N., Stuttge, L., Timis, C. N., Thompson, I. J., Winfield, J. S., and Ziman, V.

Subjects
Nuclear Theory
Abstract

The $B$(E1;$1/2^+\to1/2^-$) strength for $^{11}$Be has been extracted from intermediate energy Coulomb excitation measurements, over a range of beam energies using a new reaction model, the extended continuum discretized coupled channels (XCDCC) method. In addition, a measurement of the excitation cross section for $^{11}$Be+$^{208}$Pb at 38.6 MeV/nucleon is reported. The $B$(E1) strength of 0.105(12) e$^2$fm$^2$ derived from this measurement is consistent with those made previously at 60 and 64 MeV/nucleon, i n contrast to an anomalously low result obtained at 43 MeV/nucleon. By coupling a multi-configuration description of the projectile structure with realistic reaction theory, the XCDCC model provides for the first time a fully quantum mechanical description of Coulomb excitation. The XCDCC calculations reveal that the excitation process involves significant contributions from nuclear, continuum, and higher-order effects. An analysis of the present and two earlier intermediate energy measurements yields a combined B(E1) strength of 0.105(7) e$^2$fm$^2$. This value is in good agreement with the value deduced independently from the lifetime of the $1/2^-$ state in $^{11}$Be, and has a comparable p recision., Comment: 5 pages, 2 figures, accepted for publication in Phys. Lett. B

Published
2007
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54. Structure of 12Be: intruder d-wave strength at N=8

Author

Pain, S. D., Catford, W. N., Orr, N. A., Angelique, J. C., Ashwood, N. I., Bouchat, V., Clarke, N. M., Curtis, N., Freer, M., Fulton, B. R., Hanappe, F., Labiche, M., Lecouey, J. L., Lemmon, R. C., Mahboub, D., Ninane, A., Normand, G., Soic, N., Stuttge, L., Timis, C. N., Tostevin, J. A., Winfield, J. S., and Ziman, V.

Subjects
Nuclear Experiment
Abstract

The breaking of the N=8 shell-model magic number in the 12Be ground state has been determined to include significant occupancy of the intruder d-wave orbital. This is in marked contrast with all other N=8 isotones, both more and less exotic than 12Be. The occupancies of the 0 hbar omega neutron p1/2-orbital and the 1 hbar omega, neutron d5/2 intruder orbital were deduced from a measurement of neutron removal from a high-energy 12Be beam leading to bound and unbound states in 11Be., Comment: 5 pages, 2 figures

Published
2005
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55. Three-centre cluster structure in 11C and 11B

Author

Soic, N., Freer, M., Donadille, L., Clarke, N. M., Leask, P. J., Catford, W. N., Jones, K. L., Mahboub, D., Fulton, B. R., Greenhalgh, B. J., Watson, D. L., and Weisser, D. C.

Subjects
Nuclear Experiment
Abstract

Studies of the 16O(9Be,alpha 7Be)14C, 7Li(9Be,alpha 7Li)5He and 7Li(9Be,alpha alpha t)5He reactions at E(beam)=70 and 55 MeV have been performed using resonant particle spectroscopy techniques. The 11C excited states decaying into alpha+7Be(gs) are observed between 8.5 and 13.5 MeV. The alpha+7Li(gs), alpha+7Li*(4.652 MeV) and t+8Be(gs) decays of 11B excited states between 9 and 19 MeV are observed. The decay processes are used to indicate the possible three-centre 2alpha+3He (2alpha+3H) cluster structure of observed states. This cluster structure is more prominent in the positive-parity states, where two rotational bands with large deformations are suggested. Excitations of some of the observed T=1/2 resonances coincide with the energies of previously measured T=3/2 isobaric analogs of the 11Be states,indicating that these states may have mixed isospin., Comment: Contribution for the proceedings of the NUSTAR'05: NUclear STructure, Astrophysics and Reactions, University of Surrey, Guildford, UK; accepted for publication in Journal of Physics G

Published
2005
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56. alpha-decay of excited states in 11C and 11B

Author

Soic, N., Freer, M., Donadille, L., Clarke, N. M., Leask, P. J., Catford, W. N., Jones, K. L., Mahboub, D., Fulton, B. R., Greenhalgh, B. J., Watson, D. L., and Weisser, D. C.

Subjects
Nuclear Experiment
Abstract

Studies of the 16O(9Be,alpha7Be)14C and 7Li(9Be,alpha7Li)5He reactions at E{beam}=70 MeV have been performed using resonant particle spectroscopy techniques. The 11C excited states decaying into alpha+7Be(gs) are observed at 8.65, 9.85, 10.7 and 12.1 MeV as well as possible states at 12.6 and 13.4 MeV. This result is the first observation of alpha-decay for excited states above 9 MeV. The alpha+7Li(gs) decay of 11B excited states at 9.2, 10.3, 10.55, 11.2, (11.4), 11.8, 12.5,(13.0), 13.1, (14.0), 14.35, (17.4) and (18.6) MeV is observed. The decay processes are used to indicate the possible three-centre 2alpha+3He(3H) cluster structure of observed states. Two rotational bands corresponding to very deformed structures are suggested for the positive-parity states. Excitations of some observed T=1/2 resonances coincide with the energies of T=3/2 states which are the isobaric analogs of the lowest 11Be states. Some of these states may have mixed isospin., Comment: accepted for publication in Nuclear Physics A

Published
2004
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57. Search for 12C+12C molecule in 24Mg* populated by 24Mg+12C

Author

Beck, C., Zafra, A. Sanchez i, Haas, F., Papka, P., Rauch, V., Rousseau, M., Azaiez, F., Bednarczyk, P., Curien, D., Dorvaux, O., Nourreddine, A., Robin, J., von Oertzen, W., Gebauer, B., Kokalova, T., Thummerer, S., de Angelis, G., Gadea, A., Lenzi, S., Napoli, D. R., Szilner, S., Catford, W. N., and Jenkins, D.

Subjects
Nuclear Experiment
Abstract

The gamma-decay properties of 24Mg excited states are investigated in the inverse reaction 24Mg+12C at E(24Mg) = 130 MeV. At this energy the direct inelastic scattering populates a 24Mg* energy region where 12C+12C breakup resonances can occur. Very exclusive data were collected with the Binary Reaction Spectrometer (BRS) in coincidence with EUROBALL installed at the VIVITRON Tandem facility of the IReS at Strasbourg. The experimental detection system is decribed and preliminary results of binary reaction coincid data are presented., Comment: 4 pages, 2 figures included; paper presented at the Nucleus-Nucleus Conference, Moscow, June 2003, and submitted to Nucl. Phys. A

Published
2003
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58. Cluster structure of 13C probed via the 7Li(9Be,13C*->9Be+alpha) reaction

Author

Soic, N., Freer, M., Donadille, L., Clarke, N. M., Leask, P. J., Catford, W. N., Jones, K. L., Mahboub, D., Fulton, B. R., Greenhalgh, B. J., Watson, D. L., and Weisser, D. C.

Subjects
Nuclear Experiment
Abstract

A study of the 7Li(9Be,4He9Be)3H reaction at E{beam}=70 MeV has been performed using resonant particle spectroscopy techniques and provides a measurement of alpha-decaying states in 13C. Excited states are observed at 12.0, 13.4, 14.1, 14.6, 15.2, 16.8, 17.9, 18.7, 21.3 and 23.9 MeV. This study provides the first measurement of the three highest energy states. Angular distribution measurements have been performed and have been employed to indicate the transferred angular momentum for the populated states. These data are compared with recent speculations of the presence of chain-like structures in 13C., Comment: accepted for publication in Nuclear Physics A

Published
2003
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59. 4He decay of excited states in 14C

Author

Soic, N., Freer, M., Donadille, L., Clarke, N. M., Leask, P. J., Catford, W. N., Jones, K. L., Mahboub, D., Fulton, B. R., Greenhalgh, B. J., Watson, D. L., and Weisser, D. C.

Subjects
Nuclear Experiment, Nuclear Theory
Abstract

A study of the 7Li(9Be,4He 10Be)2H reaction at E{beam}=70 MeV has been performed using resonant particle spectroscopy techniques and provides the first measurements of alpha-decaying states in 14C. Excited states are observed at 14.7, 15.5, 16.4, 18.5, 19.8, 20.6, 21.4, 22.4 and 24.0 MeV. The experimental technique was able to resolve decays to the various particle bound states in 10Be, and provides evidence for the preferential decay of the high energy excited states into states in 10Be at ~6 MeV. The decay processes are used to indicate the possible cluster structure of the 14C excited states., Comment: accepted for publication in PRC

Published
2003
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60. Single-neutron transfer from 11Be gs via the (p,d) reaction with a radioactive beam

Author

Winfield, J. S., Fortier, S., Catford, W. N., Pita, S., Orr, N. A., Van de Wiele, J., Blumenfeld, Y., Chapman, R., Chappell, S. P. G., Clarke, N. M., Curtis, N., Freer, M., Gales, S., Langevin-Joliot, H., Laurent, H., Lhenry, I., Maison, J. M., Roussel-Chomaz, P., Shawcross, M., Spohr, K., Suomijarvi, T., and de Vismes, A.

Subjects
Nuclear Experiment
Abstract

The 11Be(p,d)10Be reaction has been performed in inverse kinematics with a radioactive 11Be beam of E/A = 35.3 MeV. Angular distributions for the 0+ ground state, the 2+, 3.37 MeV state and the multiplet of states around 6 MeV in 10Be were measured at angles up to 16 deg CM by detecting the 10Be in a dispersion-matched spectrometer and the coincident deuterons in a silicon array. Distorted wave and coupled-channels calculations have been performed to investigate the amount of 2+ core excitation in 11Be gs. The use of "realistic" 11Be wave functions is emphasised and bound state form factors have been obtained by solving the particle-vibration coupling equations. This calculation gives a dominant 2s component in the 11Be gs wave function with a 16% [2+ x 1d] core excitation admixture. Cross sections calculated with these form factors are in good agreement with the present data. The Separation Energy prescription for the bound state wave function also gives satisfactory fits to the data, but leads to a significantly larger [2 x 1d] component in 11Be gs., Comment: 39 pages, 12 figures. Accepted for publication in Nuclear Physics A. Added minor corrections made in proof to pages 26 and 34

Published
2000
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61. One-neutron removal reactions on neutron-rich psd-shell nuclei

Author

Sauvan, E., Carstoiu, F., Orr, N. A., Angelique, J. C., Catford, W. N., Clarke, N. M., Mac Cormick, M., Curtis, N., Freer, M., Grevy, S., Brun, C. Le, Lewitowicz, M., Liegard, E., Marques, F. M., Roussel-Chomaz, P., Laurent, M. G. Saint, Shawcross, M., and Winfield, J. S.

Subjects
Nuclear Experiment
Abstract

A systematic study of high energy, one-neutron removal reactions on 23 neutron-rich, psd--shell nuclei (Z=5-9, A=12-25) has been carried out. The longitudinal momentum distributions of the core fragments and corresponding single-neutron removal cross sections are reported for reactions on a carbon target. Extended Glauber model calculations, weighted by the spectroscopic factors obtained from shell model calculations, are compared to the experimental results. Conclusions are drawn regarding the use of such reactions as a spectroscopic tool and spin-parity assignments are proposed for 15B, 17C, 19-21N, 21,23O, 23-25F. The nature of the weakly bound systems 14B and 15,17C is discussed., Comment: 11 pages + 2 figures

Published
2000
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62. The Halo of 14Be

Author

Labiche, M., Orr, N. A., Marques, F. M., Angelique, J. C., Axelsson, L., Benoit, B., Bergmann, U. C., Borge, M. J. G., Catford, W. N., Chappell, S. P. G., Clarke, N. M., Costa, G., Curtis, N., D'Arrigo, A., Brennand, E. de Goes, Dorvaux, O., Fazio, G., Freer, M., Fulton, B. R., Giardina, G., Grevy, S., Guillemaud-Mueller, D., Hanappe, F., Jones, B. Heusch K. L., Jonson, B., Brun, C. Le, Leenhardt, S., Lewitowicz, M., Lopez, M. J., Markenroth, K., Mueller, A. C., Nilsson, T., Ninane, A., Nyman, G., de Oliveira, F., Piqueras, I., Riisager, K., Laurent, M. G. Saint, Sarazin, F., Singer, S. M., Sorlin, O., and Stuttge, L.

Subjects
Nuclear Experiment
Abstract

The two-neutron halo nucleus 14Be has been investigated in a kinematically complete measurement of the fragments (12Be and neutrons) produced in dissociation at 35 MeV/nucleon on C and Pb targets. Two-neutron removal cross-sections, neutron angular distributions and invariant mass spectra characteristic of a halo were observed and the electromagnetic (EMD) contributions deduced. Comparison with three-body model predictions indicate that the halo wavefunction contains a large 2s1/2^2 admixture. The EMD invariant mass spectrum exhibited a relatively narrow structure near threshold (Edecay=1.8+/-0.1 MeV, Gamma = 0.8+/-0.4 MeV) consistent with a soft-dipole excitation., Comment: 17 pages, 3 figures

Published
2000

63. Cross sections of the Rb83(p,γ)Sr84 and Kr84(p,γ)Rb85 reactions at energies characteristic of the astrophysical γ process

Author

Williams, M., primary, Davids, B., additional, Lotay, G., additional, Nishimura, N., additional, Rauscher, T., additional, Gillespie, S. A., additional, Alcorta, M., additional, Amthor, A. M., additional, Ball, G. C., additional, Bhattacharjee, S. S., additional, Bildstein, V., additional, Catford, W. N., additional, Doherty, D. T., additional, Esker, N. E., additional, Garnsworthy, A. B., additional, Hackman, G., additional, Hudson, K., additional, Lennarz, A., additional, Natzke, C., additional, Olaizola, B., additional, Psaltis, A., additional, Svensson, C. E., additional, Williams, J., additional, Walter, D., additional, and Yates, D., additional

Published
2023
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64. An innovative Superconducting Recoil Separator for HIE-ISOLDE

Author

Ministerio de Ciencia e Innovación (España), European Commission, Martel, I. [0000-0002-4895-2305], Martel, I., Acosta, L., Aguado, J. L., Assie, M., Al-Aqeel, M. A.M., Ballarino, A., Barna, D., Berjillos, R., Bonora, M., Bontoiu, C., García Borge, María José, Briz, José Antonio, Bustinduy, I., Bottura, L., Catalina-Medina, L., Catford, W., Cederkäll, J., Davinson, T., de Angelis, G., Devred, A., Díaz-Martín, C., Ekelöf, T., Felice, H., Fynbo, H., Foussat, A. P., Florin, R., Freeman, S. J., Gaffney, L., García-Ramos, C., Gentini, L., Gonzalez-Cordero, C. A., Guazzoni, C., Haziot, A., Heinz, A., Jimenez, J. M., Johnston, K., Jonson, B., Kirby, G., Kirby, O., Kurtukian-Nieto, T., Labiche, M., Liebsch, M., Losasso, M., Laird, A., Muñoz, J. L., Nara Singh, B. S., Neyens, G., Napiorkowski, P. J., O'Donnell, D., Page, R. D., Perini, D., Resta-López, J., Riddone, G., Rodriguez, J. A., Rodin, V., Russenschuck, S., Sharma, V. R., Salguero-Andújar, F., Sánchez-Segovia, J., Riisager, K., Sánchez-Benítez, A. M., Shepherd, B., Siesling, E., Smallcombe, J., Stanoiu, M., Tengblad, Olof, Thermeau, J. P., Tommasini, D., Uusitalo, J., Varnasseri, S., Welsch, C. P., Willering, G., Ministerio de Ciencia e Innovación (España), European Commission, Martel, I. [0000-0002-4895-2305], Martel, I., Acosta, L., Aguado, J. L., Assie, M., Al-Aqeel, M. A.M., Ballarino, A., Barna, D., Berjillos, R., Bonora, M., Bontoiu, C., García Borge, María José, Briz, José Antonio, Bustinduy, I., Bottura, L., Catalina-Medina, L., Catford, W., Cederkäll, J., Davinson, T., de Angelis, G., Devred, A., Díaz-Martín, C., Ekelöf, T., Felice, H., Fynbo, H., Foussat, A. P., Florin, R., Freeman, S. J., Gaffney, L., García-Ramos, C., Gentini, L., Gonzalez-Cordero, C. A., Guazzoni, C., Haziot, A., Heinz, A., Jimenez, J. M., Johnston, K., Jonson, B., Kirby, G., Kirby, O., Kurtukian-Nieto, T., Labiche, M., Liebsch, M., Losasso, M., Laird, A., Muñoz, J. L., Nara Singh, B. S., Neyens, G., Napiorkowski, P. J., O'Donnell, D., Page, R. D., Perini, D., Resta-López, J., Riddone, G., Rodriguez, J. A., Rodin, V., Russenschuck, S., Sharma, V. R., Salguero-Andújar, F., Sánchez-Segovia, J., Riisager, K., Sánchez-Benítez, A. M., Shepherd, B., Siesling, E., Smallcombe, J., Stanoiu, M., Tengblad, Olof, Thermeau, J. P., Tommasini, D., Uusitalo, J., Varnasseri, S., Welsch, C. P., and Willering, G.

Abstract

The ISOLDE Scientific Infrastructure at CERN offers a unique range of post-accelerated radioactive beams. The scientific program can be improved with the “Isolde Superconducting Recoil Separator” (ISRS), an innovative spectrometer able to deliver unprecedented (A, Z) resolution. In this paper we present an overview of the physics and ongoing technical developments.

Published
2023

65. 13,14B(n, γ) via Coulomb Dissociation for Nucleosynthesis towards the r-Process

Author

Altstadt, S.G., Adachi, T., Aksyutina, Y., Alcantara, J., Alvarez-Pol, H., Ashwood, N., Atar, L., Aumann, T., Avdeichikov, V., Barr, M., Beceiro, S., Bemmerer, D., Benlliure, J., Bertulani, C.A., Boretzky, K., Borge, M.J.G., Burgunder, G., Caamano, M., Caesar, C., Casarejos, E., Catford, W., Cederkäll, J., Chakraborty, S., Chartier, M., Chulkov, L., Cortina-Gil, D., Datta Pramanik, U., Diaz Fernandez, P., Dillmann, I., Elekes, Z., Enders, J., Ershova, O., Estrade, A., Farinon, F., Fraile, L.M., Freer, M., Freudenberger, M., Fynbo, H.O.U., Galaviz, D., Geissel, H., Gernhäuser, R., Göbel, K., Golubev, P., Gonzalez Diaz, D., Hagdahl, J., Heftrich, T., Heil, M., Heine, M., Heinz, A., Henriques, A., Holl, M., Holt, J.D., Ickert, G., Ignatov, A., Jakobsson, B., Johansson, H.T., Jonson, B., Kalantar-Nayestanaki, N., Kanungo, R., Kelic-Heil, A., Knöbel, R., Kröll, T., Krücken, R., Kurcewicz, J., Kurz, N., Labiche, M., Langer, C., Le Bleis, T., Lemmon, R., Lepyoshkina, O., Machado, J., Marganiec, J., Maroussov, V., Menéndez, J., Mostazo, M., Movsesyan, A., Najafi, M.A., Nilsson, T., Nociforo, C., Panin, V., Perea, A., Pietri, S., Plag, R., Prochazka, A., Rahaman, A., Rastrepina, G., Reifarth, R., Ribeiro, G., Ricciardi, M.V., Rigollet, C., Riisager, K., Röder, M., Rossi, D., Sanchez del Rio, J., Savran, D., Scheit, H., Schwenk, A., Simon, H., Simonis, J., Sonnabend, K., Sorlin, O., Stoica, V., Streicher, B., Taylor, J., Tengblad, O., Terashima, S., Thies, R., Togano, Y., Uberseder, E., Van de Walle, J., Velho, P., Volkov, V., Wagner, A., Wamers, F., Weick, H., Weigand, M., Wheldon, C., Wilson, G., Wimmer, C., Winfield, J.S., Woods, P., Yakorev, D., Zhukov, M.V., Zilges, A., Zoric, M., and Zuber, K.

Published
2014
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67. Reaction cross-sections and reduced strong absorption radii of nuclei in the vicinity of closed shells N = 20 and N = 28

Author

Khouaja, A., Villari, A. C. C., Benjelloun, M., Auger, G., Baiborodin, D., Catford, W., Chartier, M., Demonchy, C. E., Dlouhy, Z., Gillibert, A., Giot, L., Hirata, D., Lépine-Szily, A., Mittig, W., Orr, N., Penionzhkevich, Y., Pitae, S., Roussel-Chomaz, P., Saint-Laurent, M. G., Savajols, H., Gross, Carl J., editor, Nazarewicz, Witold, editor, and Rykaczewski, Krzysztof P., editor

Published
2005
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68. New mass measurements at the neutron drip-line

Author

Savajols, H., Jurado, B., Mittig, W., Baiborodin, D., Catford, W., Chartier, M., Demonchy, C.E., Dlouhy, Z., Gillibert, A., Giot, L., Khouaja, A., Lépine-Szily, A., Lukyanov, S., Mrazek, J., Orr, N., Penionzhkevich, Y., Pita, S., Rousseau, M., Roussel-Chomaz, P., Villari, A.C.C., Gross, Carl J., editor, Nazarewicz, Witold, editor, and Rykaczewski, Krzysztof P., editor

Published
2005
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69. Isotopic cross sections of fragmentation residues produced by light projectiles on carbon near 400A MeV

Author

Boillos, J. M., Cortina-Gil, D., Benlliure, J., Rodríguez-Sánchez, J. L., Alvarez-Pol, H., Atar, L., Aumann, T., Avdeichikov, V. V., Beceiro-Novo, S., (0000-0003-0470-8367) Bemmerer, D., Bertulani, C. A., Boretzky, K., Borge, M. J. G., Caamaño, M., Caesar, C., Casarejos, E., Catford, W., Cederkall, J., Chartier, M., Chulkov, L., Cravo, E., Crespo, R. N. P., Dillmann, I., Díaz Fernández, P., Elekes, Z., Enders, J., Ershova, O., Estrade, A., Farinon, F., Fraile, L. M., Freer, M., Galaviz Redondo, D., Geissel, H., Gernhäuser, R., Golubev, P., Göbel, K., Hagdahl, J., Heftrich, T., Heil, M., Heine, M., Heinz, A., Henriques, A., Holl, M., Hufnagel, A., Ignatov, A., Johansson, H. T., Jonson, B., Kahlbow, J., Kalantar-Nayestanaki, N., Kanungo, R., Kelic-Heil, A., Knyazev, A., Kröll, T., Kurz, N., Labiche, M., Langer, C., Le Bleis, T., Lemmon, R., Lindberg, S., Machado, J. F. D. C., Marganiec, J., Movsesyan, A., Nacher, E., Najafi, M. A., Nilsson, T., Nociforo, C., Panin, V., Paschalis, S., Perea, A., Petri, M., Pietri, S., Plag, R., Reifarth, R., Ribeiro, G., Rigollet, C., Rossi, D. M., Röder, M., Savran, D., Scheit, H., Simon, H., Sorlin, O., Syndikus, I. J., Taylor, J. T., Tengblad, O., Thies, R., Togano, Y., Vandebrouck, M., Velho, P. J. F., Volkov, V., (0000-0001-7575-3961) Wagner, A., Wamers, F., Weick, H., Wheldon, C., Wilson, G. L., Winfield, J. S., Woods, P., Yakorev, D., Zhukov, M., Zilges, A., Zuber, K., Boillos, J. M., Cortina-Gil, D., Benlliure, J., Rodríguez-Sánchez, J. L., Alvarez-Pol, H., Atar, L., Aumann, T., Avdeichikov, V. V., Beceiro-Novo, S., (0000-0003-0470-8367) Bemmerer, D., Bertulani, C. A., Boretzky, K., Borge, M. J. G., Caamaño, M., Caesar, C., Casarejos, E., Catford, W., Cederkall, J., Chartier, M., Chulkov, L., Cravo, E., Crespo, R. N. P., Dillmann, I., Díaz Fernández, P., Elekes, Z., Enders, J., Ershova, O., Estrade, A., Farinon, F., Fraile, L. M., Freer, M., Galaviz Redondo, D., Geissel, H., Gernhäuser, R., Golubev, P., Göbel, K., Hagdahl, J., Heftrich, T., Heil, M., Heine, M., Heinz, A., Henriques, A., Holl, M., Hufnagel, A., Ignatov, A., Johansson, H. T., Jonson, B., Kahlbow, J., Kalantar-Nayestanaki, N., Kanungo, R., Kelic-Heil, A., Knyazev, A., Kröll, T., Kurz, N., Labiche, M., Langer, C., Le Bleis, T., Lemmon, R., Lindberg, S., Machado, J. F. D. C., Marganiec, J., Movsesyan, A., Nacher, E., Najafi, M. A., Nilsson, T., Nociforo, C., Panin, V., Paschalis, S., Perea, A., Petri, M., Pietri, S., Plag, R., Reifarth, R., Ribeiro, G., Rigollet, C., Rossi, D. M., Röder, M., Savran, D., Scheit, H., Simon, H., Sorlin, O., Syndikus, I. J., Taylor, J. T., Tengblad, O., Thies, R., Togano, Y., Vandebrouck, M., Velho, P. J. F., Volkov, V., (0000-0001-7575-3961) Wagner, A., Wamers, F., Weick, H., Wheldon, C., Wilson, G. L., Winfield, J. S., Woods, P., Yakorev, D., Zhukov, M., Zilges, A., and Zuber, K.

Abstract

We measured 135 cross sections of residual nuclei produced in fragmentation reactions of 12C, 14N, and 13−16,20,22O projectiles impinging on a carbon target at kinetic energies of near 400A MeV, most of them for the first time, with the R 3B/LAND setup at the GSI facility in Darmstadt (Germany). The use of this state-of-the-art experimental setup in combination with the inverse kinematics technique gave the full identification in atomic and mass numbers of fragmentation residues with a high precision. The cross sections of these residues were determined with uncertainties below 20% for most of the cases. These data are compared to other previous measurements with stable isotopes and are also used to benchmark different model calculations.

Published
2022

70. Isotopic cross sections of fragmentation residues produced by light projectiles on carbon near

Author

Ministerio de Ciencia e Innovación (España), Xunta de Galicia, Federal Ministry of Education and Research (Germany), Swedish Research Council, Department of Energy (US), Boillos, J. M., Cortina-Gil, D., Benlliure, J., Rodríguez-Sánchez, J. L., Alvarez-Pol, H., Atar, L., Aumann, T., Avdeichikov, V. V., Beceiro-Novo, S., Bemmerer, D., Bertulani, C. A., Boretzky, K., García Borge, María José, Caamaño, M., Caesar, C., Casarejos, E., Catford, W., Cederkall, J., Chartier, M., Chulkov, L., Cravo, E., Crespo, R. N.P., Dillmann, I., Díaz Fernández, P., Elekes, Z., Enders, J., Ershova, O., Estrade, A., Farinon, F., Fraile, Luis M., Freer, M., Galaviz, D., Geissel, H., Gernhäuser, R., Golubev, P., Göbel, K., Hagdahl, J., Heftrich, T., Heil, M., Heine, M., Heinz, A., Henriques, A., Holl, M., Hufnagel, A., Ignatov, A., Johansson, H.T., Jonson, B., Kahlbow, J., Kalantar-Nayestanaki, N., Kanungo, R., Kelic-Heil, A., Knyazev, A., Kröll, T., Kurz, N., Labiche, M., Langer, C., Le Bleis, T., Lemmon, R., Lindberg, S., Machado, J. F.D.C., Marganiec, J., Movsesyan, A., Nacher, E., Najafi, M.A., Nilsson, T., Nociforo, C., Panin, V., Paschalis, S., Perea, Ángel, Petri, M., Pietri, S., Plag, R., Reifarth, R., Ribeiro, Guillermo, Rigollet, C., Rossi, D. M., Röder, M., Savran, D., Scheit, H., Simon, H., Sorlin, O., Syndikus, I. J., Taylor, J. T., Tengblad, Olof, Thies, R., Togano, Y., Vandebrouck, M., Velho, P. J.F., Volkov, V., Wagner, A., Wamers, F., Weick, H., Wheldon, C., Wilson, G. L., Winfield, J. S., Woods, P., Yakorev, D., Zhukov, M., Zilges, A., Zuber, K., Ministerio de Ciencia e Innovación (España), Xunta de Galicia, Federal Ministry of Education and Research (Germany), Swedish Research Council, Department of Energy (US), Boillos, J. M., Cortina-Gil, D., Benlliure, J., Rodríguez-Sánchez, J. L., Alvarez-Pol, H., Atar, L., Aumann, T., Avdeichikov, V. V., Beceiro-Novo, S., Bemmerer, D., Bertulani, C. A., Boretzky, K., García Borge, María José, Caamaño, M., Caesar, C., Casarejos, E., Catford, W., Cederkall, J., Chartier, M., Chulkov, L., Cravo, E., Crespo, R. N.P., Dillmann, I., Díaz Fernández, P., Elekes, Z., Enders, J., Ershova, O., Estrade, A., Farinon, F., Fraile, Luis M., Freer, M., Galaviz, D., Geissel, H., Gernhäuser, R., Golubev, P., Göbel, K., Hagdahl, J., Heftrich, T., Heil, M., Heine, M., Heinz, A., Henriques, A., Holl, M., Hufnagel, A., Ignatov, A., Johansson, H.T., Jonson, B., Kahlbow, J., Kalantar-Nayestanaki, N., Kanungo, R., Kelic-Heil, A., Knyazev, A., Kröll, T., Kurz, N., Labiche, M., Langer, C., Le Bleis, T., Lemmon, R., Lindberg, S., Machado, J. F.D.C., Marganiec, J., Movsesyan, A., Nacher, E., Najafi, M.A., Nilsson, T., Nociforo, C., Panin, V., Paschalis, S., Perea, Ángel, Petri, M., Pietri, S., Plag, R., Reifarth, R., Ribeiro, Guillermo, Rigollet, C., Rossi, D. M., Röder, M., Savran, D., Scheit, H., Simon, H., Sorlin, O., Syndikus, I. J., Taylor, J. T., Tengblad, Olof, Thies, R., Togano, Y., Vandebrouck, M., Velho, P. J.F., Volkov, V., Wagner, A., Wamers, F., Weick, H., Wheldon, C., Wilson, G. L., Winfield, J. S., Woods, P., Yakorev, D., Zhukov, M., Zilges, A., and Zuber, K.

Abstract

We measured 135 cross sections of residual nuclei produced in fragmentation reactions of C12, N14, and O13−16,20,22 projectiles impinging on a carbon target at kinetic energies of near 400A MeV, most of them for the first time, with the RB3/LAND setup at the GSI facility in Darmstadt (Germany). The use of this state-of-the-art experimental setup in combination with the inverse kinematics technique gave the full identification in atomic and mass numbers of fragmentation residues with a high precision. The cross sections of these residues were determined with uncertainties below 20% for most of the cases. These data are compared to other previous measurements with stable isotopes and are also used to benchmark different model calculations.

Published
2022

71. Isotopic cross sections of fragmentation residues produced by light projectiles on carbon near

Author

Boillos, J. M., Cortina-Gil, D., Benlliure, J., Rodríguez-Sánchez, J. L., Alvarez-Pol, H., Atar, L., Aumann, T., Avdeichikov, V. V., Beceiro-Novo, S., Bemmerer, D., Bertulani, C. A., Boretzky, K., García Borge, María José, Caamaño, M., Caesar, C., Casarejos, E., Catford, W., Cederkall, J., Chartier, M., Chulkov, L., Cravo, E., Crespo, R. N.P., Dillmann, I., Díaz Fernández, P., Elekes, Z., Enders, J., Ershova, O., Estrade, A., Farinon, F., Fraile, L. M., Freer, M., Galaviz Redondo, D., Geissel, H., Gernhäuser, R., Golubev, P., Göbel, K., Hagdahl, J., Heftrich, T., Heil, M., Heine, M., Heinz, A., Henriques, A., Holl, M., Hufnagel, A., Ignatov, A., Johansson, H.T., Jonson, B., Kahlbow, J., Kalantar-Nayestanaki, N., Kanungo, R., Kelic-Heil, A., Knyazev, A., Kröll, T., Kurz, N., Labiche, M., Langer, C., Le Bleis, T., Lemmon, R., Lindberg, S., Machado, J. F.D.C., Marganiec, J., Movsesyan, A., Nacher, E., Najafi, M.A., Nilsson, T., Nociforo, C., Panin, V., Paschalis, S., Perea, Ángel, Petri, M., Pietri, S., Plag, R., Reifarth, R., Ribeiro, Guillermo, Rigollet, C., Rossi, D. M., Röder, M., Savran, D., Scheit, H., Simon, H., Sorlin, O., Syndikus, I. J., Taylor, J. T., Tengblad, Olof, Thies, R., Togano, Y., Vandebrouck, M., Velho, P. J.F., Volkov, V., Wagner, A., Wamers, F., Weick, H., Wheldon, C., Wilson, G. L., Winfield, J. S., Woods, P., Yakorev, D., Zhukov, M., Zilges, A., Zuber, K., Ministerio de Ciencia e Innovación (España), Xunta de Galicia, Federal Ministry of Education and Research (Germany), Swedish Research Council, and Department of Energy (US)

Abstract

13 pags., 8 figs., 1 tab., We measured 135 cross sections of residual nuclei produced in fragmentation reactions of C12, N14, and O13−16,20,22 projectiles impinging on a carbon target at kinetic energies of near 400A MeV, most of them for the first time, with the RB3/LAND setup at the GSI facility in Darmstadt (Germany). The use of this state-of-the-art experimental setup in combination with the inverse kinematics technique gave the full identification in atomic and mass numbers of fragmentation residues with a high precision. The cross sections of these residues were determined with uncertainties below 20% for most of the cases. These data are compared to other previous measurements with stable isotopes and are also used to benchmark different model calculations., This work has been partially supported by the Spanish Ministry for Science and Innovation under Grants No. PGC2018-099746-B-C21, No. PGC2018-099746-B-C22, and No. PID2019-104390GB-100; Xunta de Galicia under program “Grupos de referencia competitiva” (Project No. ED431C 2017/54); the German Bundesministerium für Bildung und Forschung (BMBF) (Grants No. 05P12RDFN8, No. 05P15RDFN1, and No. 05P19RDFN); the Swedish Research Council; and U.S. Department of Energy Grant No. DE-FG02-08ER41533. J.J.R.S. acknowledges the support of Xunta de Galicia under Grant No. ED481B-2017/002.

Published
2022

72. Experimental evidence of a v (1d5/2)2 component to the 12Be ground state

Author

Pain, S. D., Catford, W. N., Orr, N. A., Angelique, J. C., Ashwood, N. I., Bouchat, V., Clarke, N. M., Curtis, N., Freer, M., Fulton, B. R., Hanappe, F., Labiche, M., Lecouey, J. L., Lemmon, R. C., Mahboub, D., Ninane, A., Normand, G., Soić, N., Stuttge, L., Timis, C. N., Tostevin, J. A., Winfield, J. S., Ziman, V., Gross, Carl J., editor, Nazarewicz, Witold, editor, and Rykaczewski, Krzysztof P., editor

Published
2005
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74. The electron–ion scattering experiment ELISe at the International Facility for Antiproton and Ion Research (FAIR)—A conceptual design study

Author

Antonov, A.N., Gaidarov, M.K., Ivanov, M.V., Kadrev, D.N., Aïche, M., Barreau, G., Czajkowski, S., Jurado, B., Belier, G., Chatillon, A., Granier, T., Taieb, J., Doré, D., Letourneau, A., Ridikas, D., Dupont, E., Berthoumieux, E., Panebianco, S., Farget, F., Schmitt, C., Audouin, L., Khan, E., Tassan-Got, L., Aumann, T., Beller, P., Boretzky, K., Dolinskii, A., Egelhof, P., Emling, H., Franzke, B., Geissel, H., Kelic-Heil, A., Kester, O., Kurz, N., Litvinov, Y., Münzenberg, G., Nolden, F., Schmidt, K.-H., Scheidenberger, Ch., Simon, H., Steck, M., Weick, H., Enders, J., Pietralla, N., Richter, A., Schrieder, G., Zilges, A., Distler, M.O., Merkel, H., Müller, U., Junghans, A.R., Lenske, H., Fujiwara, M., Suda, T., Kato, S., Adachi, T., Hamieh, S., Harakeh, M.N., Kalantar-Nayestanaki, N., Wörtche, H., Berg, G.P.A., Koop, I.A., Logatchov, P.V., Otboev, A.V., Parkhomchuk, V.V., Shatilov, D.N., Shatunov, P.Y., Shatunov, Y.M., Shiyankov, S.V., Shvartz, D.I., Skrinsky, A.N., Chulkov, L.V., Danilin, B.V., Korsheninnikov, A.A., Kuzmin, E.A., Ogloblin, A.A., Volkov, V.A., Grishkin, Y., Lisin, V.P., Mushkarenkov, A.N., Nedorezov, V., Polonski, A.L., Rudnev, N.V., Turinge, A.A., Artukh, A., Avdeichikov, V., Ershov, S.N., Fomichev, A., Golovkov, M., Gorshkov, A.V., Grigorenko, L., Klygin, S., Krupko, S., Meshkov, I.N., Rodin, A., Sereda, Y., Seleznev, I., Sidorchuk, S., Syresin, E., Stepantsov, S., Ter-Akopian, G., Teterev, Y., Vorontsov, A.N., Kamerdzhiev, S.P., Litvinova, E.V., Karataglidis, S., Alvarez Rodriguez, R., Borge, M.J.G., Fernandez Ramirez, C., Garrido, E., Sarriguren, P., Vignote, J.R., Fraile Prieto, L.M., Lopez Herraiz, J., Moya de Guerra, E., Udias-Moinelo, J., Amaro Soriano, J.E., Lallena Rojo, A.M., Caballero, J.A., Johansson, H.T., Jonson, B., Nilsson, T., Nyman, G., Zhukov, M., Golubev, P., Rudolph, D., Hencken, K., Jourdan, J., Krusche, B., Rauscher, T., Kiselev, D., Trautmann, D., Al-Khalili, J., Catford, W., Johnson, R., Stevenson, P.D., Barton, C., Jenkins, D., Lemmon, R., Chartier, M., Cullen, D., Bertulani, C.A., and Heinz, A.

Published
2011
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75. Experimental study of the nature of the and excited states in using the reaction in inverse kinematics

Author

Kuhn, K., Sarazin, F., Nunes, F. M., Alvarez, M. A.G., Andreoiu, C., Bardayan, D. W., Bender, P. C., Blackmon, J. C., García Borge, María José, Braid, R., Brown, B. A., Catford, W. N., Diget, C. Aa., Di Pietro, A., Drake, T. E., Figuera, P., Garnsworthy, A.B., Gómez-Camacho, Joaquín, Hackman, G., Hager, U., Ilyushkin, S. V., Nácher, Enrique, O'Malley, P. D., Perea, Ángel, Pesudo, V., Pittman, S. T., Smalley, D., Svensson, C. E., Tengblad, Olof, Thompson, P., Unsworth, C., Wang, Z. M., Department of Energy (US), Colorado School of Mines, Oak Ridge National Laboratory (US), National Nuclear Security Administration (US), National Science Foundation (US), Natural Sciences and Engineering Research Council of Canada, Canada Foundation for Innovation, British Columbia Knowledge Development Fund, Istituto Nazionale di Fisica Nucleare, Agencia Estatal de Investigación (España), Sarazin, F., and Sarazin, F. [0000-0001-5614-1986]

Abstract

10 pags., 8 figs., 4 tabs., The nature of the and excited states in is studied using the transfer reaction in inverse kinematics at 10A MeV at TRIUMF ISAC-II, in particular to assess whether either of them can be considered as an excited halo state. The angular distributions for both states are extracted using deuteron- coincidences and analyzed using a transfer model taking into account one-step and two-step processes. A good fit of the angular distributions is obtained considering only the one-step process, whereby an inner neutron of is removed, leaving the halo neutron intact. Higher-order processes however cannot be rejected. The small spectroscopic factors extracted suggest that the structure of both states is not uniquely halo-like, but rather display a more complex configuration mixing cluster and halo structures. Further insights are limited, as this experiment specifically probed the halo-like (but not cluster-like) configuration in both states., This work was partially supported by the U.S. Department of Energy (DOE) through Grants/Contracts No. DE-FG03-93ER40789 (Colorado School of Mines), No. DEFG02-96ER40978 (Louisiana State), No. DE-SC0021422 (Michigan State), No. DE-AC05-00OR22725 (Oak Ridge National Laboratory), the National Nuclear Security Administration (NNSA) under the Stewardship Science Academic Alliances program through U.S. DOE Cooperative Agreements No. DE-FG52-08NA28552, and the National Science Foundation under Grant No. PHY-1811815 (Michigan State). This work is also supported by the Natural Sciences and Engineering Research Council of Canada (NSERC), the Canadian Foundation for Innovation (CFI), the British Columbia Knowledge and Development Fund (BCKDF), the Italian National Institute for Nuclear Physics (INFN), the Spanish Ministry of Science and Innovation and FEDER funds under Projects RTI2018-098117-B-C21 and PGC2018-096994-BC21, and the Spanish Agency of Research (AEI) via Project No. PID2019-104714GB-C21.

Published
2021

76. (Li6, d) and (Li6, t) reactions on Ne22 and implications for s -process nucleosynthesis

Author

Ota, S., primary, Christian, G., additional, Catford, W. N., additional, Lotay, G., additional, Pignatari, M., additional, Battino, U., additional, Bennett, E. A., additional, Dede, S., additional, Doherty, D. T., additional, Hallam, S., additional, Herwig, F., additional, Hooker, J., additional, Hunt, C., additional, Jayatissa, H., additional, Matta, A., additional, Moukaddam, M., additional, Rao, E., additional, Rogachev, G. V., additional, Saastamoinen, A., additional, Scriven, D., additional, Tostevin, J. A., additional, Upadhyayula, S., additional, and Wilkinson, R., additional

Published
2021
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77. Evolution of single-particle structure near the N=20 island of inversion

Author

MacGregor, P. T., primary, Sharp, D. K., additional, Freeman, S. J., additional, Hoffman, C. R., additional, Kay, B. P., additional, Tang, T. L., additional, Gaffney, L. P., additional, Baader, E. F., additional, Borge, M. J. G., additional, Butler, P. A., additional, Catford, W. N., additional, Cropper, B. D., additional, de Angelis, G., additional, Konki, J., additional, Kröll, Th., additional, Labiche, M., additional, Lazarus, I. H., additional, Lubna, R. S., additional, Martel, I., additional, McNeel, D. G., additional, Page, R. D., additional, Poleshchuk, O., additional, Raabe, R., additional, Recchia, F., additional, and Yang, J., additional

Published
2021
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78. Experimental study of the nature of the 1− and 2− excited states in Be10 using the Be11(p,d) reaction in inverse kinematics

Author

Kuhn, K., primary, Sarazin, F., additional, Nunes, F. M., additional, Alvarez, M. A. G., additional, Andreoiu, C., additional, Bardayan, D. W., additional, Bender, P. C., additional, Blackmon, J. C., additional, Borge, M. J. G., additional, Braid, R., additional, Brown, B. A., additional, Catford, W. N., additional, Diget, C. Aa., additional, DiPietro, A., additional, Drake, T. E., additional, Figuera, P., additional, Garnsworthy, A. B., additional, Gómez-Camacho, J., additional, Hackman, G., additional, Hager, U., additional, Ilyushkin, S. V., additional, Nácher, E., additional, O'Malley, P. D., additional, Perea, A., additional, Pesudo, V., additional, Pittman, S. T., additional, Smalley, D., additional, Svensson, C. E., additional, Tengblad, O., additional, Thompson, P., additional, Unsworth, C., additional, and Wang, Z. M., additional

Published
2021
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79. Neutron capture cross sections of light neutron-rich nuclei relevant for r -process nucleosynthesis

Author

Bhattacharyya, A., primary, Datta, Ushasi, additional, Rahaman, A., additional, Chakraborty, S., additional, Aumann, T., additional, Beceiro-Novo, S., additional, Boretzky, K., additional, Caesar, C., additional, Carlson, B. V., additional, Catford, W. N., additional, Chartier, M., additional, Cortina-Gil, D., additional, Das, P., additional, Angelis, G. De., additional, Fernandez, P. Diaz, additional, Emling, H., additional, Geissel, H., additional, Gonzalez-Diaz, D., additional, Heine, M., additional, Johansson, H., additional, Jonson, B., additional, Kalantar-Nayestanaki, N., additional, Kröll, T., additional, Krücken, R., additional, Kurcewicz, J., additional, Langer, C., additional, Le Bleis, T., additional, Leifels, Y., additional, Marganiec, J., additional, Münzenberg, G., additional, Nilsson, T., additional, Nociforo, C., additional, Panin, V., additional, Paschalis, S., additional, Plag, R., additional, Reifarth, R., additional, Ricciardi, M. V., additional, Rigollet, C., additional, Rossi, D., additional, Scheidenberger, C., additional, Scheit, H., additional, Simon, H., additional, Togano, Y., additional, Typel, S., additional, Utsuno, Y., additional, Wagner, A., additional, Wamers, F., additional, Weick, H., additional, and Winfield, J. S., additional

Published
2021
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80. The MUGAST-AGATA-VAMOS campaign: Set-up and performances

Author

Assié, M., primary, Clément, E., additional, Lemasson, A., additional, Ramos, D., additional, Raggio, A., additional, Zanon, I., additional, Galtarossa, F., additional, Lenain, C., additional, Casal, J., additional, Flavigny, F., additional, Matta, A., additional, Mengoni, D., additional, Beaumel, D., additional, Blumenfeld, Y., additional, Borcea, R., additional, Brugnara, D., additional, Catford, W., additional, de Oliveira, F., additional, Delaunay, F., additional, De Séréville, N., additional, Didierjean, F., additional, Diget, C.Aa., additional, Dudouet, J., additional, Fernández-Domínguez, B., additional, Fougères, C., additional, Frémont, G., additional, Girard-Alcindor, V., additional, Giret, A., additional, Goasduff, A., additional, Gottardo, A., additional, Goupil, J., additional, Hammache, F., additional, John, P.R., additional, Korichi, A., additional, Lalanne, L., additional, Leblond, S., additional, Lefevre, A., additional, Legruel, F., additional, Ménager, L., additional, Million, B., additional, Nicolle, C., additional, Noury, F., additional, Rauly, E., additional, Rezynkina, K., additional, Rindel, E., additional, Rojo, J.S., additional, Siciliano, M., additional, Stanoiu, M., additional, Stefan, I., additional, and Vatrinet, L., additional

Published
2021
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81. First Direct Measurement of an Astrophysical p -Process Reaction Cross Section Using a Radioactive Ion Beam

Author

Lotay, G., primary, Gillespie, S. A., additional, Williams, M., additional, Rauscher, T., additional, Alcorta, M., additional, Amthor, A. M., additional, Andreoiu, C. A., additional, Baal, D., additional, Ball, G. C., additional, Bhattacharjee, S. S., additional, Behnamian, H., additional, Bildstein, V., additional, Burbadge, C., additional, Catford, W. N., additional, Doherty, D. T., additional, Esker, N. E., additional, Garcia, F. H., additional, Garnsworthy, A. B., additional, Hackman, G., additional, Hallam, S., additional, Hudson, K. A., additional, Jazrawi, S., additional, Kasanda, E., additional, Kennington, A. R. L., additional, Kim, Y. H., additional, Lennarz, A., additional, Lubna, R. S., additional, Natzke, C. R., additional, Nishimura, N., additional, Olaizola, B., additional, Paxman, C., additional, Psaltis, A., additional, Svensson, C. E., additional, Williams, J., additional, Wallis, B., additional, Yates, D., additional, Walter, D., additional, and Davids, B., additional

Published
2021
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82. New constraints on the Al25(p,γ) reaction and its influence on the flux of cosmic γ rays from classical nova explosions

Author

Canete, L., primary, Lotay, G., additional, Christian, G., additional, Doherty, D. T., additional, Catford, W. N., additional, Hallam, S., additional, Seweryniak, D., additional, Albers, H. M., additional, Almaraz-Calderon, S., additional, Bennett, E. A., additional, Carpenter, M. P., additional, Chiara, C. J., additional, Greene, J. P., additional, Hoffman, C. R., additional, Janssens, R. V. F., additional, José, J., additional, Kankainen, A., additional, Lauritsen, T., additional, Matta, A., additional, Moukaddam, M., additional, Ota, S., additional, Saastamoinen, A., additional, Wilkinson, R., additional, and Zhu, S., additional

Published
2021
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83. New constraints on the Al 25 (p,γ) reaction and its influence on the flux of cosmic γ rays from classical nova explosions

Author

Canete, L., Lotay, G., Christian, G., Doherty, D.T., Catford, W. N., Hallam, S., Seweryniak, D., Albers, H. M., Almaraz-Calderón, S., Bennett, E. Andrew, Carpenter, M. P., Chiara, C. J., Greene, J. P., Hoffman, C. R., Janssens, R. V. F., Kankainen, A., Lauritsen, T., Matta, A., Moukaddam, M., Department of Energy (US), Science and Technology Facilities Council (UK), Ministerio de Economía y Competitividad (España), and Generalitat de Catalunya

Subjects
Nucleon induced nuclear reactions, Radiative capture, Nuclear astrophysics, Nuclear reactions, Lifetimes and widths, Nuclear structure and decays, Nucleosynthesis in explosive environments
Abstract

The astrophysical Al25(p,γ)Si26 reaction represents one of the key remaining uncertainties in accurately modeling the abundance of radiogenic Al26 ejected from classical novae. Specifically, the strengths of key proton-unbound resonances in Si26, that govern the rate of the Al25(p,γ) reaction under explosive astrophysical conditions, remain unsettled. Here, we present a detailed spectroscopy study of the Si26 mirror nucleus Mg26. We have measured the lifetime of the 3+, 6.125-MeV state in Mg26 to be 19(3)fs and provide compelling evidence for the existence of a 1- state in the T=1,A=26 system, indicating a previously unaccounted for=1 resonance in the Al25(p,γ) reaction. Using the presently measured lifetime, together with the assumption that the likely 1- state corresponds to a resonance in the Al25+p system at 435.7(53) keV, we find considerable differences in the Al25(p,γ) reaction rate compared to previous works. Based on current nova models, we estimate that classical novae may be responsible for up to ≈15% of the observed galactic abundance of Al26., This work was supported by the U.S. Department of Energy, Office of Science, Office of Nuclear Physics, under Contract No. DEAC02-06CH11357 and Grants No. DEFG02-94-ER40834, No. DEFG02-97-ER41041, No. DEFG02-97-ER41043, and No. DE-FG02-93ER4077. U.K. personnel were supported by the Science and Technologies Facilities Council (STFC). This work was partially supported by the Spanish MINECO Grant No. AYA2017-86274-P, by the E.U. FEDER funds, and by the AGAUR/Generalitat de Catalunya Grant No. SGR-661/2017. This article benefited from discussions within the “ChETEC” COST Action (Grant No. CA16117). This research used resources of ANL's ATLAS facility, which is a DOE Office of Science User facility.

Published
2021

84. New constraints on the Al25(p,γ) reaction and its influence on the flux of cosmic γ rays from classical nova explosions

Author

Canete, L., Lotay, G., Christian, G., Doherty, D. T., Catford, W. N., Hallam, S., Seweryniak, D., Albers, H. M., Almaraz-Calderon, S., Bennett, E. A., Carpenter, M. P., Chiara, C. J., Greene, J. P., Hoffman, C. R., Janssens, R. V. F., José, J., Kankainen, A., Lauritsen, T., Matta, A., Moukaddam, M., Ota, S., Saastamoinen, A., Wilkinson, R., and Zhu, S.

Subjects
astrofysiikka, gammasäteily, ydinfysiikka, kosminen säteily, novat
Abstract

The astrophysical 25Al(p,γ)26Si reaction represents one of the key remaining uncertainties in accurately modeling the abundance of radiogenic 26Al ejected from classical novae. Specifically, the strengths of key proton-unbound resonances in 26Si, that govern the rate of the 25Al(p,γ) reaction under explosive astrophysical conditions, remain unsettled. Here, we present a detailed spectroscopy study of the 26Si mirror nucleus 26Mg. We have measured the lifetime of the 3+, 6.125-MeV state in 26Mg to be 19(3)fs and provide compelling evidence for the existence of a 1− state in the T=1,A=26 system, indicating a previously unaccounted for ℓ=1 resonance in the 25Al(p,γ) reaction. Using the presently measured lifetime, together with the assumption that the likely 1− state corresponds to a resonance in the 25Al+p system at 435.7(53) keV, we find considerable differences in the 25Al(p,γ) reaction rate compared to previous works. Based on current nova models, we estimate that classical novae may be responsible for up to ≈15% of the observed galactic abundance of 26Al. peerReviewed

Published
2021

85. Experimental study of the nature of the and excited states in using the reaction in inverse kinematics

Author

Department of Energy (US), Colorado School of Mines, Oak Ridge National Laboratory (US), National Nuclear Security Administration (US), National Science Foundation (US), Natural Sciences and Engineering Research Council of Canada, Canada Foundation for Innovation, British Columbia Knowledge Development Fund, Istituto Nazionale di Fisica Nucleare, Agencia Estatal de Investigación (España), Sarazin, F. [0000-0001-5614-1986], Kuhn, K., Sarazin, F., Nunes, F. M., Álvarez, M. A. G., Andreoiu, C., Bardayan, D. W., Bender, P. C., Blackmon, J. C., García Borge, María José, Braid, R., Brown, B. A., Catford, W. N., Diget, C. Aa., Di Pietro, A., Drake, T. E., Figuera, P., Garnsworthy, A.B., Gómez-Camacho, Joaquín, Hackman, G., Hager, U., Ilyushkin, S. V., Nácher, Enrique, O'Malley, P. D., Perea, Ángel, Pesudo, V., Pittman, S. T., Smalley, D., Svensson, C. E., Tengblad, Olof, Thompson, P., Unsworth, C., Wang, Z. M., Department of Energy (US), Colorado School of Mines, Oak Ridge National Laboratory (US), National Nuclear Security Administration (US), National Science Foundation (US), Natural Sciences and Engineering Research Council of Canada, Canada Foundation for Innovation, British Columbia Knowledge Development Fund, Istituto Nazionale di Fisica Nucleare, Agencia Estatal de Investigación (España), Sarazin, F. [0000-0001-5614-1986], Kuhn, K., Sarazin, F., Nunes, F. M., Álvarez, M. A. G., Andreoiu, C., Bardayan, D. W., Bender, P. C., Blackmon, J. C., García Borge, María José, Braid, R., Brown, B. A., Catford, W. N., Diget, C. Aa., Di Pietro, A., Drake, T. E., Figuera, P., Garnsworthy, A.B., Gómez-Camacho, Joaquín, Hackman, G., Hager, U., Ilyushkin, S. V., Nácher, Enrique, O'Malley, P. D., Perea, Ángel, Pesudo, V., Pittman, S. T., Smalley, D., Svensson, C. E., Tengblad, Olof, Thompson, P., Unsworth, C., and Wang, Z. M.

Abstract

The nature of the and excited states in is studied using the transfer reaction in inverse kinematics at 10A MeV at TRIUMF ISAC-II, in particular to assess whether either of them can be considered as an excited halo state. The angular distributions for both states are extracted using deuteron- coincidences and analyzed using a transfer model taking into account one-step and two-step processes. A good fit of the angular distributions is obtained considering only the one-step process, whereby an inner neutron of is removed, leaving the halo neutron intact. Higher-order processes however cannot be rejected. The small spectroscopic factors extracted suggest that the structure of both states is not uniquely halo-like, but rather display a more complex configuration mixing cluster and halo structures. Further insights are limited, as this experiment specifically probed the halo-like (but not cluster-like) configuration in both states.

Published
2021

86. Storage ring at HIE-ISOLDE: Technical design report

Author

Grieser, M., Litvinov, Yu. A., Raabe, R., Blaum, K., Blumenfeld, Y., Butler, P. A., Wenander, F., Woods, P. J., Aliotta, M., Andreyev, A., Artemyev, A., Atanasov, D., Aumann, T., Balabanski, D., Barzakh, A., Batist, L., Bernardes, A. -P., Bernhardt, D., Billowes, J., Bishop, S., Borge, M., Borzov, I., Bosch, F., Boston, A. J., Brandau, C., Catford, W., Catherall, R., Cederkäll, J., Cullen, D., Davinson, T., Dillmann, I., Dimopoulou, C., Dracoulis, G., Düllmann, Ch. E., Egelhof, P., Estrade, A., Fischer, D., Flanagan, K., Fraile, L., Fraser, M. A., Freeman, S. J., Geissel, H., Gerl, J., Greenlees, P., Grisenti, R. E., Habs, D., von Hahn, R., Hagmann, S., Hausmann, M., He, J. J., Heil, M., Huyse, M., Jenkins, D., Jokinen, A., Jonson, B., Joss, D. T., Kadi, Y., Kalantar-Nayestanaki, N., Kay, B. P., Kiselev, O., Kluge, H. -J., Kowalska, M., Kozhuharov, C., Kreim, S., Kröll, T., Kurcewicz, J., Labiche, M., Lemmon, R. C., Lestinsky, M., Lotay, G., Ma, X. W., Marta, M., Meng, J., Mücher, D., Mukha, I., Müller, A., Murphy, A. St J., Neyens, G., Nilsson, T., Nociforo, C., Nörtershäuser, W., Page, R. D., Pasini, M., Petridis, N., Pietralla, N., Pfützner, M., Podolyák, Z., Regan, P., Reed, M. W., Reifarth, R., Reiter, P., Repnow, R., Riisager, K., Rubio, B., Sanjari, M. S., Savin, D. W., Scheidenberger, C., Schippers, S., Schneider, D., Schuch, R., Schwalm, D., Schweikhard, L., Shubina, D., Siesling, E., Simon, H., Simpson, J., Smith, J., Sonnabend, K., Steck, M., Stora, T., Stöhlker, T., Sun, B., Surzhykov, A., Suzaki, F., Tarasov, O., Trotsenko, S., Tu, X. L., Van Duppen, P., Volpe, C., Voulot, D., Walker, P. M., Wildner, E., Winckler, N., Winters, D. F. A., Wolf, A., Xu, H. S., Yakushev, A., Yamaguchi, T., Yuan, Y. J., Zhang, Y. H., and Zuber, K.

Published
2012
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87. Structure of neutron-rich nuclei around the N = 126 closed shell; the yrast structure of 205Au126 up to spin-parity $I^{\pi}$ = (19/2+)

Author

Podolyák, Zs., Steer, S. J., Pietri, S., Górska, M., Regan, P. H., Rudolph, D., Garnsworthy, A. B., Hoischen, R., Gerl, J., Wollersheim, H. J., Grawe, H., Maier, K. H., Becker, F., Bednarczyk, P., Cáceres, L., Doornenbal, P., Geissel, H., Grebosz, J., Kelic, A., Kojouharov, I., Kurz, N., Montes, F., Prokopowicz, W., Saito, T., Schaffner, H., Tashenov, S., Heinz, A., Kurtukian-Nieto, T., Benzoni, G., Pfützner, M., Jungclaus, A., Balabanski, D. L., Brandau, C., Brown, B. A., Bruce, A. M., Catford, W. N., Cullen, I. J., Dombrádi, Zs., Estevez, M. E., Gelletly, W., Ilie, G., Jolie, J., Jones, G. A., Kmiecik, M., Kondev, F. G., Krücken, R., Lalkovski, S., Liu, Z., Maj, A., Myalski, S., Schwertel, S., Shizuma, T., Walker, P. M., Werner-Malento, E., and Wieland, O.

Published
2009
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90. Level structure of the Tz=−1 nucleus Ar34 and its relevance for nucleosynthesis in ONe novae

Author

Kennington, A. R. L., primary, Lotay, G., additional, Doherty, D. T., additional, Seweryniak, D., additional, Andreoiu, C., additional, Auranen, K., additional, Carpenter, M. P., additional, Catford, W. N., additional, Deibel, C. M., additional, Hadyńska-Klȩk, K., additional, Hallam, S., additional, Hoff, D., additional, Huang, T., additional, Janssens, R. V. F., additional, Jazrawi, S., additional, José, J., additional, Kondev, F. G., additional, Lauritsen, T., additional, Li, J., additional, Rogers, A. M., additional, Saiz, J., additional, Savard, G., additional, Stolze, S., additional, Wilson, G. L., additional, and Zhu, S., additional

Published
2021
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91. Exciting isomers from the first stopped-beam RISING campaign

Author

Rudolph, D., Pietri, S., Podolyák, Zs., Regan, P. H., Garnsworthy, A. B., Hoischen, R., Steer, S. J., Becker, F., Bednarczyk, P., Caceres, L., Doornenbal, P., Geissel, H., Gerl, J., Górska, M., Grębosz, J., Kelic, A., Kojouharov, I., Kurz, N., Montes, F., Prokopowicz, W., Saito, T., Schaffner, H., Tashenov, S., Werner-Malento, E., Wollersheim, H. J., Andersson, L.-L., Atanasova, L., Balabanski, D. L., Bentley, M. A., Benzoni, G., Blank, B., Blazhev, A., Brandau, C., Brown, J. R., Bruce, A. M., Camera, F., Catford, W. N., Cullen, I. J., Dombrádi, Zs., Estevez, E., Fahlander, C., Gelletly, W., Heinz, A., Hellström, M., Ilie, G., Johansson, E. K., Jolie, J., Jones, G. A., Jungclaus, A., Kmiecik, M., Kondev, F. G., Kurtukian-Nieto, T., Lalkovski, S., Liu, Z., Maj, A., Myalski, S., Pfützner, M., Shizuma, T., Simons, A. J., Schwertel, S., Walker, P. M., and Wieland, O.

Published
2007
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92. Isomeric decay studies around 204Pt and 148Tb

Author

Podolyák, Zs., Steer, S. J., Pietri, S., Werner-Malento, E., Regan, P. H., Rudolph, D., Garnsworthy, A. B., Hoischen, R., Górska, M., Gerl, J., Wollersheim, H. J., Kurtukian-Nieto, T., Benzoni, G., Becker, F., Bednarczyk, P., Caceres, L., Doornenbal, P., Geissel, H., Grębosz, J., Kelic, A., Kojouharov, I., Kurz, N., Montes, F., Prokopowicz, W., Saito, T., Schaffner, H., Tashenov, S., Heinz, A., Pfützner, M., Hellström, M., Jungclaus, A., Andersson, L.-L., Atanasova, L., Balabanski, D. L., Bentley, M. A., Blank, B., Blazhev, A., Brandau, C., Brown, J., Bruce, A. M., Camera, F., Catford, W. N., Cullen, I. J., Dombrádi, Zs., Estevez, E., Fahlander, C., Gelletly, W., Ilie, G., Johansson, E. K., Jolie, J., Jones, G. A., Kmiecik, M., Kondev, F. G., Lalkovski, S., Liu, Z., Maj, A., Myalski, S., Shizuma, T., Simons, A. J., Schwertel, S., Walker, P. M., Wieland, O., and Brown, B. A.

Published
2007
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93. Shape coexistence in 74Kr and 76Kr

Author

Görgen, A., Clément, E., Korten, W., Bouchez, E., Chatillon, A., Hürstel, A., Le Coz, Y., Theisen, Ch., Wilson, J. N., Zielinska, M., Andreoiu, C., Becker, F., Butler, P., Casandjian, J. M., Catford, W. N., Czosnyka, T., de France, G., Gerl, J., Herzberg, R.-D., Iwanicki, J., Jenkins, D. G., Jones, G. D., Napiorkowski, P. J., Sletten, G., and Timis, C.

Published
2007
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94. Decay properties of $^{22}\mathrm{Ne} + ��$ resonances and their impact on $s$-process nucleosynthesis

Author

Ota, S., Christian, G., Lotay, G., Catford, W. N., Bennett, E. A., Dede, S., Doherty, D. T., Hallam, S., Hooker, J., Hunt, C., Jayatissa, H., Matta, A., Moukaddam, M., Rogachev, G. V., Saastamoinen, A., Tostevin, J. A., Upadhyayula, S., and Wilkinson, R.

Subjects
Nuclear Theory (nucl-th), FOS: Physical sciences, Nuclear Experiment (nucl-ex), Nuclear Experiment, Solar and Stellar Astrophysics (astro-ph.SR)
Abstract

The astrophysical $s$-process is one of the two main processes forming elements heavier than iron. A key outstanding uncertainty surrounding $s$-process nucleosynthesis is the neutron flux generated by the ${}^{22}\mathrm{Ne}(��, n){}^{25}\mathrm{Mg}$ reaction during the He-core and C-shell burning phases of massive stars. This reaction, as well as the competing ${}^{22}\mathrm{Ne}(��, ��){}^{26}\mathrm{Mg}$ reaction, is not well constrained in the important temperature regime from ${\sim} 0.2$--$0.4$~GK, owing to uncertainties in the nuclear properties of resonances lying within the Gamow window. To address these uncertainties, we have performed a new measurement of the ${}^{22}\mathrm{Ne}({}^{6}\mathrm{Li}, d){}^{26}\mathrm{Mg}$ reaction in inverse kinematics, detecting the outgoing deuterons and ${}^{25,26}\mathrm{Mg}$ recoils in coincidence. We have established a new $n / ��$ decay branching ratio of $1.14(26)$ for the key $E_x = 11.32$ MeV resonance in $^{26}\mathrm{Mg}$, which results in a new $(��, n)$ strength for this resonance of $42(11)~��$eV when combined with the well-established $(��, ��)$ strength of this resonance. We have also determined new upper limits on the $��$ partial widths of neutron-unbound resonances at $E_x = 11.112,$ $11.163$, $11.169$, and $11.171$ MeV. Monte-Carlo calculations of the stellar ${}^{22}\mathrm{Ne}(��, n){}^{25}\mathrm{Mg}$ and ${}^{22}\mathrm{Ne}(��, ��){}^{26}\mathrm{Mg}$ rates, which incorporate these results, indicate that both rates are substantially lower than previously thought in the temperature range from ${\sim} 0.2$--$0.4$~GK., 17 pages, 4 figures, accepted for publication in Phys. Lett. B

Published
2020
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95. Probing the Z=6 spin-orbit shell gap with (p,2p) quasi-free scattering reactions

Author

Syndikus, I, Petri, M., Macchiavelli, A. O., Paschalis, S., Bertulani, C. A., Aumann, T., Alvarez-Pol, H., Atar, L., Beceiro-Novo, S., Benlliure, J., Boillos, J. M., Boretzky, K., Borge, M. J. G., Brown, B. A., Caamano, M., Caesar, C., Casarejos, E., Catford, W., Cederkall, J., Chakraborty, S., Chulkov, L., V, Cortina-Gil, D., Cravo, E., Crespo, R., Pramanik, U. Datta, Dillmann, I, Fernandez, P. Diaz, Elekes, Z., Enders, J., Farinon, F., Fraile, L. M., Galaviz, D., Geissel, H., Gernhaeuser, R., Golubev, P., Goebel, K., Heil, M., Heine, M., Heinz, A., Henriques, A., Holl, M., Johansson, H. T., Jonson, B., Kalantar-Nayestanaki, N., Kanungo, R., Kelic-Heil, A., Kroll, T., Kurz, N., Langer, C., Le Bleis, T., Machado, J., Marganiec-Galazka, J., Nacher, E., Nilsson, T., Nociforo, C., Panin, V, Perea, A., Pietri, S. B., Plag, R., Rahaman, A., Reifarth, R., Revel, A., Ribeiro, G., Rigollet, C., Rossi, D. M., Savran, D., Scheit, H., Simon, H., Sorlin, O., Tengblad, O., Togano, Y., Vandebrouck, M., Volkov, V., Wamers, F., Wheldon, C., Wilson, G. L., Winfield, J. S., Weick, H., Woods, P., Yakorev, D., Zhukov, M., Zilges, A., Zuber, K., Syndikus, I, Petri, M., Macchiavelli, A. O., Paschalis, S., Bertulani, C. A., Aumann, T., Alvarez-Pol, H., Atar, L., Beceiro-Novo, S., Benlliure, J., Boillos, J. M., Boretzky, K., Borge, M. J. G., Brown, B. A., Caamano, M., Caesar, C., Casarejos, E., Catford, W., Cederkall, J., Chakraborty, S., Chulkov, L., V, Cortina-Gil, D., Cravo, E., Crespo, R., Pramanik, U. Datta, Dillmann, I, Fernandez, P. Diaz, Elekes, Z., Enders, J., Farinon, F., Fraile, L. M., Galaviz, D., Geissel, H., Gernhaeuser, R., Golubev, P., Goebel, K., Heil, M., Heine, M., Heinz, A., Henriques, A., Holl, M., Johansson, H. T., Jonson, B., Kalantar-Nayestanaki, N., Kanungo, R., Kelic-Heil, A., Kroll, T., Kurz, N., Langer, C., Le Bleis, T., Machado, J., Marganiec-Galazka, J., Nacher, E., Nilsson, T., Nociforo, C., Panin, V, Perea, A., Pietri, S. B., Plag, R., Rahaman, A., Reifarth, R., Revel, A., Ribeiro, G., Rigollet, C., Rossi, D. M., Savran, D., Scheit, H., Simon, H., Sorlin, O., Tengblad, O., Togano, Y., Vandebrouck, M., Volkov, V., Wamers, F., Wheldon, C., Wilson, G. L., Winfield, J. S., Weick, H., Woods, P., Yakorev, D., Zhukov, M., Zilges, A., and Zuber, K.

Abstract

The evolution of the traditional nuclear magic numbers away from the valley of stability is an active field of research. Experimental efforts focus on providing key spectroscopic information that will shed light into the structure of exotic nuclei and understanding the driving mechanism behind the shell evolution. In this work, we investigate the Z = 6 spin-orbit shell gap towards the neutron dripline. To do so, we employed N-A(p,2p)CA-1 quasi-free scattering reactions to measure the proton component of the 2(1)(+) state of C-16,C-18,C-20. The experimental findings support the notion of a moderate reduction of the proton 1p(1/2) - 1p(3/2) spin-orbit splitting, at variance to recent claims for a prevalent Z = 6 magic number towards the neutron dripline. (C) 2020 The Authors. Published by Elsevier B.V.

Published
2020

97. Exploiting Isospin Symmetry to Study the Role of Isomers in Stellar Environments

Author

Hallam, S., primary, Lotay, G., additional, Gade, A., additional, Doherty, D. T., additional, Belarge, J., additional, Bender, P. C., additional, Brown, B. A., additional, Browne, J., additional, Catford, W. N., additional, Elman, B., additional, Estradé, A., additional, Hall, M. R., additional, Longfellow, B., additional, Lunderberg, E., additional, Montes, F., additional, Moukaddam, M., additional, O’Malley, P., additional, Ong, W.-J., additional, Schatz, H., additional, Seweryniak, D., additional, Schmidt, K., additional, Timofeyuk, N. K., additional, Weisshaar, D., additional, and Zegers, R. G. T., additional

Published
2021
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98. Interaction potential and reaction cross section of neutron rich nuclei on protons

Author

Roussel-Chomaz, P., de Vismes, A., Mittig, W., Alamanos, N., Angélique, J-C., Auger, F., Barrette, J., Bauge, E., Belozyorov, A. V., Borcea, C., Carstoiu, F., Catford, W., Cortina-Gil, M-D., Delaroche, J-P., Dlouhy, Z., Gillibert, A., Hirata, D., Lapoux, V., Lepine-Szily, A., Lukyanov, S. M., Marie, F., Musumarra, A., de Oliveira, F., Orr, N., Ottini, S., Pakou, A., Penionzhkevich, Y. E., Sarazin, F., Savajols, H., Skobelev, N., Äystö, Juha, editor, Dendooven, Peter, editor, Jokinen, Ari, editor, and Leino, Matti, editor

Published
2003
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99. r過程元素合成に関わる軽い中性子過剰核の中性子捕獲断面積

Author

Bhattacharyya, A., Datta, U., Rahaman, A., Chakraborty, S., Aumann, T., Beceiro-Novo, S., Boretzky, K., Caesar, C., Carlson, B. V., Catford, W. N., Chartier, M., Cortina-Gil, D., Das, P., De Angelis, G., Diaz Fernandez, P., Emling, H., Geissel, H., Gonzalez-Diaz, D., Heine, M., Johansson, H., Jonson, B., Kalantar-Nayestanaki, N., Kr\\\'oll, T., Kr\\\'ucken, R., Kurcewicz, J., Langer, C., Le Bleis, T., Leifels, Y., Marganiec, J., M\\\'unzenberg, G., Nilsson, T., Scheidenberger, C., Scheit, H., Simon, H., Togano, Yasuhiro, Typel, S., Utsuno, Yutaka, Wagner, A., Wamers, F., Weick, H., and Winfield, J. S.

Abstract

中性子過剰核に対する中性子捕獲断面積は、$r$過程元素合成を理解する上で直接必要なデータであるものの、中性子標的が存在しないことと中性子過剰核の半減期が短いため、その実験を行うことは困難である。その代替手段として、$(n,\gamma)$反応の逆過程である$(\gamma,n)$反応のデータから導出する方法が行われている。本論文では、中性子数20領域の中性子過剰核に対し、クーロン分解反応を用いて$(\gamma,n)$反応の断面積を測定し、そこから$(n,\gamma)$反応の断面積を得た。その結果、$^{28,29}$Naと$^{34}$Alに対する中性子捕獲断面積については、統計模型で予測された値よりも小さく、$^{32}$Mgに対しては大きな値となることがわかった。

Published
2021

100. Quasi-free neutron and proton knockout reactions from light nuclei in a wide neutron-to-proton asymmetry range

Author

Holl, M., Panin, V., Alvarez-Pol, H., Atar, L., Aumann, T., Beceiro-Novo, S., Benlliure, J., Bertulani, C.A., Boillos, J.M., Boretzky, K., Caamaño, M., Caesar, C., Casarejos, E., Catford, W., Cederkall, J., Chulkov, L., Cortina-Gil, D., Cravo, E., Dillmann, I., Díaz Fernández, P., Elekes, Z., Enders, J., Fraile, L.M., Galaviz Redondo, D., Gernhäuser, R., Golubev, P., Heftrich, T., Heil, M., Heine, M., Heinz, A., Henriques, A., Johansson, H.T., Jonson, B., Kalantar-Nayestanaki, N., Kanungo, R., Kelic-Heil, A., Kröll, T., Kurz, N., Langer, C., Le Bleis, T., Lindberg, S., Machado, J., Nacher, E., Najafi, M.A., Nilsson, T., Nociforo, C., Paschalis, S., Petri, M., Reifarth, R., Ribeiro, G., Rigollet, C., Rossi, D.M., Savran, D., Scheit, H., Simon, H., Sorlin, O., Syndikus, I., Tengblad, O., Togano, Y., Vandebrouck, M., Velho, P., Wamers, F., Weick, H., Wheldon, C., Wilson, G.L., Winfield, J.S., Woods, P., Zhukov, M., and Zuber, K.

Published
2019
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