Search

Your search keyword '"Pancin, J"' showing total 24 results
Start Over Author "Pancin, J" Publication Year Range Last 3 years
24 results on '"Pancin, J"'

1. Mirror nucleon-transfer reactions from $^{18}$Ne and $^{18}$O

Author

Flavigny, F., Keeley, N., Gillibert, A., Lapoux, V., Lemasson, A., Audirac, L., Bastin, B., Boissinot, S., Caccitti, J., Corsi, A., Damoy, S., Franchoo, S., Gangnant, P., Gibelin, J., Goupil, J., Hammache, F., Houarner, C., Jacquot, B., Lebertre, G., Legeard, L., Ménager, L., Morel, V., Morfouace, P., Pancin, J., Pollacco, E. C., Rejmund, M., Roger, T., Saillant, F., and Sénoville, M. more...

Subjects
Nuclear Experiment
Abstract

The $^{18}$Ne(d,t)$^{17}$Ne and $^{18}$Ne(d,$^3$He)$^{17}$F single-nucleon pickup reactions were measured at 16.5 MeV/nucleon in inverse kinematics together with elastic and inelastic scattering channels. The full set of measured exclusive differential cross sections was compared with the mirror reaction channels on stable $^{18}$O after consistent reanalysis using coupled reaction channels calculations. Within this interpretation scheme, most of the spectroscopic factors extracted for the population of unbound states in $^{17}$F match within uncertainties with their mirror partners in $^{17}$O. However, for the deeply-bound neutron removal channel to $^{17}$Ne, a significant symmetry breaking with the mirror proton-removal channel leading to $^{17}$N is evidenced by an overall single-particle strength reduction. more...

Published
2024
Full Text
View/download PDF

2. N=16 magicity revealed at the proton drip-line through the study of 35Ca

Author

Lalanne, L., Sorlin, O., Poves, A., Assié, M., Hammache, F., Koyama, S., Suzuki, D., Flavigny, F., Girard-Alcindor, V., Lemasson, A., Matta, A., Roger, T., Beaumel, D., Blumenfeld, Y, Brown, B. A., Santos, F. De Oliveira, Delaunay, F., de Séréville, N., Franchoo, S., Gibelin, J., Guillot, J., Kamalou, O., Kitamura, N., Lapoux, V., Mauss, B., Morfouace, P., Pancin, J., Saito, T. Y., Stodel, C., and Thomas, J-C. more...

Subjects
Nuclear Experiment
Abstract

The last proton bound calcium isotope $^{35}$Ca has been studied for the first time, using the $^{37}$Ca($p, t$)$^{35}$Ca two neutron transfer reaction. The radioactive $^{37}$Ca nuclei, produced by the LISE spectrometer at GANIL, interacted with the protons of the liquid hydrogen target CRYPTA, to produce tritons $t$ that were detected in the MUST2 detector array, in coincidence with the heavy residues Ca or Ar. The atomic mass of $^{35}$Ca and the energy of its first 3/2$^+$ state are reported. A large $N=16$ gap of 4.61(11) MeV is deduced from the mass measurement, which together with other measured properties, makes $^{36}$Ca a doubly-magic nucleus. The $N = 16$ shell gaps in $^{36}$Ca and $^{24}$O are of similar amplitude, at both edges of the valley of stability. This feature is discussed in terms of nuclear forces involved, within state-of-the-art shell model calculations. Even though the global agreement with data is quite convincing, the calculations underestimate the size of the $N = 16$ gap in 36Ca by 840(110) keV. more...

Published
2023

Catalog

Books, media, physical & digital resources
See catalog results

3. Cross-shell states in $^{15}$C: a test for p-sd interactions

Author

Lois-Fuentes, J., Fernández-Domínguez, B., Pereira-López, X., Delaunay, F., Catford, W. N., Matta, A., Orr, N. A., Duguet, T., Otsuka, T., Somà, V., Sorlin, O., Suzuki, T., Achouri, N. L., Assié, M., Bailey, S., Bastin, B., Blumenfeld, Y., Borcea, R., Caamaño, M., Caceres, L., Clément, E., Corsi, A., Curtis, N., Deshayes, Q., Farget, F., Fisichella, M., de France, G., Franchoo, S., Freer, M., Gibelin, J., Gillibert, A., Grinyer, G. F., Hammache, F., Kamalou, O., Knapton, A., Kokalova, Tz., Lapoux, V., Crom, B. Le, Leblond, S., Marqués, F. M., Morfouace, P., Pancin, J., Perrot, L., Piot, J., Pollacco, E., Ramos, D., Regueira-Castro, D., Rodríguez-Tajes, C., Roger, T., Rotaru, F., Sénoville, M., de Séréville, N., Smith, R., Stanoiu, M., Stefan, I., Stodel, C., Suzuki, D., Thomas, J. C., Timofeyuk, N., Vandebrouck, M., Walshe, J., and Wheldon, C. more...

Subjects
Nuclear Experiment, Nuclear Theory
Abstract

The low-lying structure of $^{15}$C has been investigated via the neutron-removal $^{16}$C$(d,t)$ reaction. Along with bound neutron sd-shell hole states, unbound p-shell hole states have been firmly confirmed. The excitation energies and the deduced spectroscopic factors of the cross-shell states are an important measure of the $[(p)^{-1}(sd)^{2}]$ neutron configurations in $^{15}$C. Our results show a very good agreement with shell-model calculations using the SFO-tls interaction for $^{15}$C. However, a modification of the $p$-$sd$ and $sd$-$sd$ monopole terms was applied in order to reproduce the $N=9$ isotone $^{17}$O. In addition, the excitation energies and spectroscopic factors have been compared to the first calculations of $^{15}$C with the $ab~ initio$ self-consistent Green's function method employing the NNLO$_{sat}$ interaction. The results show the sensitivity to the size of the $N=8$ shell gap and highlight the need of going beyond the current truncation scheme in the theory. more...

Published
2023

5. Neutron-proton pairing in the N=Z radioactive fp-shell nuclei 56Ni and 52Fe probed by pair transfer

Author

Le Crom, B, Assié, M, Blumenfeld, Y, Guillot, J, Sagawa, H, Suzuki, T, Honma, M, Achouri, NL, Bastin, B, Borcea, R, Catford, WN, Clément, E, Cáceres, L, Caamaño, M, Corsi, A, De France, G, Delaunay, F, De Séréville, N, Fernandez-Dominguez, B, Fisichella, M, Franchoo, S, Georgiadou, A, Gibelin, J, Gillibert, A, Hammache, F, Kamalou, O, Knapton, A, Lapoux, V, Leblond, S, Macchiavelli, AO, Marqués, FM, Matta, A, Ménager, L, Morfouace, P, Orr, NA, Pancin, J, Pereira-Lopez, X, Perrot, L, Piot, J, Pollacco, E, Ramos, D, Roger, T, Rotaru, F, Sánchez-Benítez, AM, Sénoville, M, Sorlin, O, Stanoiu, M, Stefan, I, Stodel, C, Suzuki, D, Thomas, J-C, and Vandebrouck, M more...

Subjects
Nuclear and Plasma Physics, Synchrotrons and Accelerators, Physical Sciences, Mathematical Physics, Astronomical and Space Sciences, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Nuclear & Particles Physics, Mathematical sciences, Physical sciences
Abstract

The isovector and isoscalar components of neutron-proton pairing are investigated in the N=Z unstable nuclei of the fp-shell through the two-nucleon transfer reaction (p,3He) in inverse kinematics. The combination of particle and gamma-ray detection with radioactive beams of 56Ni and 52Fe, produced by fragmentation at the GANIL/LISE facility, made it possible to carry out this study for the first time in a closed and an open-shell nucleus in the fp-shell. The transfer cross-sections for ground-state to ground-state (J=0+, T=1) and to the first (J=1+, T=0) state were extracted for both cases together with the transfer cross-section ratios σ(0+,T=1)/σ(1+,T=0). They are compared with second-order distorted-wave born approximation (DWBA) calculations. The enhancement of the ground-state to ground-state pair transfer cross-section close to mid-shell, in 52Fe, points towards a superfluid phase in the isovector channel. For the “deuteron-like” transfer, very low cross-sections to the first (J=1+, T=0) state were observed both for 56Ni(p,3He) and 52Fe(p,3He) and are related to a strong hindrance of this channel due to spin-orbit effect. No evidence for an isoscalar deuteron-like condensate is observed. more...

Published
2022

6. Energy loss profile measurements using the ACTAR TPC demonstrator active target

Author

Camaiani, A., Barlini, S., Stefanini, A.A., Casini, G., Alvarez-Pol, H., Arokiaraj, A., Baldesi, L., Bolzonella, R., Cardella, G., Ciampi, C., Cicerchia, M., Cinausero, M., Collazuol, G., De Filippo, E., Domenichetti, L., Fabris, D., Fernández-Domínguez, B., Fioretto, E., Frosin, C., Galtarossa, F., Giovinazzo, J., Gnoffo, B., Gramegna, F., Grinyer, G.F., Lombardo, I., Marchi, T., Martorana, N.S., Mentana, A., Ottanelli, P., Pagano, E.V., Pancin, J., Pellegriti, M.G., Piantelli, S., Pirrone, S., Poleshchuk, O., Raabe, R., Roger, T., Russo, M., Russotto, P., Scomparin, L., Swartz, J.A., Valdré, S., Verde, G., Vigilante, M., and Yang, J. more...

Published
2023
Full Text
View/download PDF

7. Proton 3D tracking and emission time from a short-lived isomer with ACTAR TPC

Author

Giovinazzo, J., Roger, T., Blank, B., Rudolph, D., Alvarez-Pol, H., Arokiaraj, A., Ascher, P., Camaaño-Fresco, M., Caceres, L., Cox, D.M., Fernández-Domínguez, B., Lois-Fuentes, J., Gerbaux, M., Grévy, S., Grinyer, G.F., Kamalou, O., Mauss, B., Mentana, A., Ortega Moral, A., Pancin, J., Pibernat, J., Piot, J., Sorlin, O., Stodel, C., Thomas, J.-C., and Versteegen, M. more...

Published
2022
Full Text
View/download PDF

8. Author Correction: 4D-imaging of drip-line radioactivity by detecting proton emission from 54mNi pictured with ACTAR TPC

Author

Giovinazzo, J., Roger, T., Blank, B., Rudolph, D., Brown, B. A., Alvarez-Pol, H., Arokia Raj, A., Ascher, P., Caamaño-Fresco, M., Caceres, L., Cox, D. M., Fernández-Domínguez, B., Lois-Fuentes, J., Gerbaux, M., Grévy, S., Grinyer, G. F., Kamalou, O., Mauss, B., Mentana, A., Pancin, J., Pibernat, J., Piot, J., Sorlin, O., Stodel, C., Thomas, J.-C., and Versteegen, M. more...

Published
2022
Full Text
View/download PDF

9. Low-lying structure of 15C: Information on the N=8 shell gap

Author

Lois-Fuentes J., Fernández-Domínguez B., Pereira-López X., Delaunay F., Catford W.N., Matta A., Orr N.A., Duguet T., Otsuka T., Somà V., Sorlin O., Suzuki T., Achouri N.L., Assié M., Bailey S., Bastin B., Blumenfeld Y., Borcea R., Caamaño M., Caceres L., Clément E., Corsi A., Curtis N., Deshayes Q., Farget F., Fisichella M., de France G., Franchoo S., Freer M., Gibelin J., Gillibert A., Grinyer G. F., Hammache F., Kamalou O., Knapton A., Kokalova Tz., Lapoux V., Le Crom B., Leblond S., Marqués F.M., Morfouace P., Pancin J., Perrot L., Piot J., Pollacco E., Ramos D., Regueira-Castro D., Rodríguez-Tajes C., Roger T., Rotaru F., Sénoville M., de Séréville N., Smith R., Stanoiu M., Stefan I., Stodel C., Suzuki D., Thomas J.C., Timofeyuk N., Vandebrouck M., Walshe J., and Wheldon C. more...

Subjects
Physics, QC1-999
Abstract

The low-lying structure of 15C has been investigated via the neutron-removal d(16C, t) reaction. The experiment was performed at GANIL using a secondary 16C beam produced by fragmentation in the LISE spectrometer at 17.2 MeV/nucleon with an intensity of 5 × 104 pps and 100% purity. The angle and energy of the light ejectile were detected by three MUST2 telescopes. The missing mass technique was used to reconstruct the excitation energy of 15C. In this spectrum, two bound states were observed (gs and the first excited state) and two unbound resonant states above the neutron separation threshold (S n = 1.218 MeV). From the differential cross sections, information on the angular momentum of the transferred nucleon and spectroscopic factors were deduced. The excitation energies and the deduced spectroscopic factors of the negative parity states placed above the neutron separation energy are an important measurement of the 2p-1h configurations in 15C. Our results show good agreement with shell-model calculations with the YSOX interaction and show a sensitivity to the N=8 shell gap. more...

Published
2023
Full Text
View/download PDF

10. Mirror symmetry at far edges of stability: The cases of C8 and He8

Author

Koyama, S., primary, Suzuki, D., additional, Assié, M., additional, Lalanne, L., additional, Sorlin, O., additional, Abe, T., additional, Beaumel, D., additional, Blumenfeld, Y., additional, Caceres, L., additional, De Oliveira Santos, F., additional, Delaunay, F., additional, Flavigny, F., additional, Franchoo, S., additional, Gibelin, J., additional, Girard-Alcindor, V., additional, Guillot, J., additional, Hammache, F., additional, Kamalou, O., additional, Kamenyero, A., additional, Kitamura, N., additional, Lapoux, V., additional, Lemasson, A., additional, Matta, A., additional, Mauss, B., additional, Morfouace, P., additional, Niikura, M., additional, Otsu, H., additional, Pancin, J., additional, Roger, T., additional, Saito, T. Y., additional, Sakurai, H., additional, Stodel, C., additional, and Thomas, J-C., additional more...

Published
2024
Full Text
View/download PDF

11. Cross-shell states in 15C: A test for p-sd interactions

Author

Lois-Fuentes, J., primary, Fernández-Domínguez, B., additional, Pereira-López, X., additional, Delaunay, F., additional, Catford, W.N., additional, Matta, A., additional, Orr, N.A., additional, Duguet, T., additional, Otsuka, T., additional, Somà, V., additional, Sorlin, O., additional, Suzuki, T., additional, Achouri, N.L., additional, Assié, M., additional, Bailey, S., additional, Bastin, B., additional, Blumenfeld, Y., additional, Borcea, R., additional, Caamaño, M., additional, Caceres, L., additional, Clément, E., additional, Corsi, A., additional, Curtis, N., additional, Deshayes, Q., additional, Farget, F., additional, Fisichella, M., additional, de France, G., additional, Franchoo, S., additional, Freer, M., additional, Gibelin, J., additional, Gillibert, A., additional, Grinyer, G.F., additional, Hammache, F., additional, Kamalou, O., additional, Knapton, A., additional, Kokalova, Tz., additional, Lapoux, V., additional, Le Crom, B., additional, Leblond, S., additional, Marqués, F.M., additional, Morfouace, P., additional, Pancin, J., additional, Perrot, L., additional, Piot, J., additional, Pollacco, E., additional, Ramos, D., additional, Regueira-Castro, D., additional, Rodríguez-Tajes, C., additional, Roger, T., additional, Rotaru, F., additional, Sénoville, M., additional, de Séréville, N., additional, Smith, R., additional, Stanoiu, M., additional, Stefan, I., additional, Stodel, C., additional, Suzuki, D., additional, Thomas, J.C., additional, Timofeyuk, N., additional, Vandebrouck, M., additional, Walshe, J., additional, and Wheldon, C., additional more...

Published
2023
Full Text
View/download PDF

12. N=16 Magicity Revealed at the Proton Drip Line through the Study of Ca35

Author

Lalanne, L., primary, Sorlin, O., additional, Poves, A., additional, Assié, M., additional, Hammache, F., additional, Koyama, S., additional, Suzuki, D., additional, Flavigny, F., additional, Girard-Alcindor, V., additional, Lemasson, A., additional, Matta, A., additional, Roger, T., additional, Beaumel, D., additional, Blumenfeld, Y, additional, Brown, B. A., additional, Santos, F. De Oliveira, additional, Delaunay, F., additional, de Séréville, N., additional, Franchoo, S., additional, Gibelin, J., additional, Guillot, J., additional, Kamalou, O., additional, Kitamura, N., additional, Lapoux, V., additional, Mauss, B., additional, Morfouace, P., additional, Pancin, J., additional, Saito, T. Y., additional, Stodel, C., additional, and Thomas, J-C., additional more...

Published
2023
Full Text
View/download PDF

13. Experimental investigation of ground-state properties of H with transfer reactions

Author

Caamaño, M., Roger, T., Moro, A.M., Grinyer, G.F., Pancin, J., Bagchi, S., Sambi, S., Gibelin, J., Fernández–Domínguez, B., Itagaki, N., Benlliure, J., Cortina–Gil, D., Farget, F., Jacquot, B., Pérez–Loureiro, D., Pietras, B., Raabe, R., Ramos, D., Rodríguez Tajes, C., Savajols, H., and Vandebrouck, M. more...

Abstract

The properties of nuclei with extreme neutron–to–proton ratios, far from those naturally occurring on Earth, are key to understand nuclear forces and how nucleons hold together to form nuclei. $^{7}$H, with six neutrons and a single proton, is the nuclear system with the most unbalanced neutron–to–proton ratio known so far. However, its sheer existence and properties are still a challenge for experimental efforts and theoretical models. Here we report experimental evidences on the formation of $^{7}$H as a resonance, detected with independent observables, and the first measurement of the structure of its ground state. The resonance is found at ∼0.7 MeV above the $^{3}$H+4n mass, with a narrow width of ∼0.2 MeV and a 1/2+ spin and parity. These data are consistent with a $^{7}$H as a $^{3}$H core surrounded by an extended four-neutron halo, with a unique four-neutron decay and a relatively long half-life thanks to neutron pairing; a prime example of new phenomena occurring in what would be the most pure-neutron nuclear matter we can access in the laboratory. more...

Published
2023

14. Neutron-proton pairing in the N=Z radioactive -shell Nuclei Ni and Fe probed by pair transfer

Author

Le Crom, B., Assié, M., Blumenfeld, Y., Guillot, J., Sagawa, H., Suzuki, T., Honma, M., Achouri, N.L., Bastin, B., Borcea, R., Catford, W.N., Clément, E., Cáceres, L., Caamaño, M., Corsi, A., De France, G., Delaunay, F., De Séréville, N., Fernandez-Dominguez, B., Fisichella, M., Franchoo, S., Georgiadou, A., Gibelin, J., Gillibert, A., Hammache, F., Kamalou, O., Knapton, A., Lapoux, V., Leblond, S., Macchiavelli, A.O., Marqués, F.M., Matta, A., Ménager, L., Morfouace, P., Orr, N.A., Pancin, J., Pereira-Lopez, X., Perrot, L., Piot, J., Pollacco, E., Ramos, D., Roger, T., Rotaru, F., Sánchez-Benítez, A.M., Sénoville, M., Sorlin, O., Stanoiu, M., Stefan, I., Stodel, C., Suzuki, D., Thomas, J.C., and Vandebrouck, M. more...

Abstract

The isovector and isoscalar components of neutron-proton pairing are investigated in the N=Z unstable nuclei of the fp-shell through the two-nucleon transfer reaction (p,$^{3}$He) in inverse kinematics. The combination of particle and gamma-ray detection with radioactive beams of $^{56}$Ni and $^{52}$Fe, produced by fragmentation at the GANIL/LISE facility, made it possible to carry out this study for the first time in a closed and an open-shell nucleus in the fp-shell. The transfer cross-sections for ground-state to ground-state (J=0$^{+}$, T=1) and to the first (J=1$^{+}$, T=0) state were extracted for both cases together with the transfer cross-section ratios σ(0+,T=1)/σ(1+,T=0). They are compared with second-order distorted-wave born approximation (DWBA) calculations. The enhancement of the ground-state to ground-state pair transfer cross-section close to mid-shell, in $^{52}$Fe, points towards a superfluid phase in the isovector channel. For the “deuteron-like” transfer, very low cross-sections to the first (J=1$^{+}$, T=0) state were observed both for $^{56}$Ni(p,$^{3}$He) and $^{52}$Fe(p,$^{3}$He) and are related to a strong hindrance of this channel due to spin-orbit effect. No evidence for an isoscalar deuteron-like condensate is observed. more...

Published
2023

15. N=16 magicity revealed at the proton drip-line through the study of 35Ca

Author

Lalanne, L, Sorlin, O, Poves, A, Assié, M, Hammache, F, Koyama, S, Suzuki, D, Flavigny, F, Girard-Alcindor, V, Lemasson, A, Matta, A, Roger, T, Beaumel, D, Blumenfeld, Y, Brown, B.A, de Oliveira Santos, F, Delaunay, F, de Séréville, N, Franchoo, S, Gibelin, J, Guillot, J, Kamalou, O, Kitamura, N, Lapoux, V, Mauss, B, Morfouace, P, Pancin, J, Saito, T.Y, Stodel, C, Thomas, J-C, Laboratoire de Physique des 2 Infinis Irène Joliot-Curie (IJCLab), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Grand Accélérateur National d'Ions Lourds (GANIL), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de physique corpusculaire de Caen (LPCC), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Département de Physique Nucléaire (ex SPhN) (DPHN), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), and Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay more...

Subjects
FOS: Physical sciences, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment (nucl-ex), Nuclear Experiment
Abstract

International audience; The last proton bound calcium isotope $^{35}$Ca has been studied for the first time, using the $^{37}$Ca($p, t$)$^{35}$Ca two neutron transfer reaction. The radioactive $^{37}$Ca nuclei, produced by the LISE spectrometer at GANIL, interacted with the protons of the liquid hydrogen target CRYPTA, to produce tritons $t$ that were detected in the MUST2 detector array, in coincidence with the heavy residues Ca or Ar. The atomic mass of $^{35}$Ca and the energy of its first 3/2$^+$ state are reported. A large $N=16$ gap of 4.61(11) MeV is deduced from the mass measurement, which together with other measured properties, makes $^{36}$Ca a doubly-magic nucleus. The $N = 16$ shell gaps in $^{36}$Ca and $^{24}$O are of similar amplitude, at both edges of the valley of stability. This feature is discussed in terms of nuclear forces involved, within state-of-the-art shell model calculations. Even though the global agreement with data is quite convincing, the calculations underestimate the size of the $N = 16$ gap in 36Ca by 840(110) keV. more...

Published
2023

16. Mirror symmetry at mass = 54: 4 Effective Charges Near Doubly Magic Ni

Author

Rudolph, D., Blank, B., Giovinazzo, J., Roger, T., Alvarez-Pol, H., Arokia Raj, A., Ascher, P., Caamaño-Fresco, M., Caceres, L., Cox, D.M., Fernández-Domínguez, B., Lois-Fuentes, J., Gerbaux, M., Grévy, S., Grinyer, G.F., Kamalou, O., Mauss, B., Mentana, A., Pancin, J., Pibernat, J., Piot, J., Sorlin, O., Stodel, C., Thomas, J.C., and Versteegen, M. more...

Abstract

Proton-emission branches of the 10+ isomer in the Tz=−1 nucleus $^{54}$Ni have been imaged with the active target and time projection chamber (ACTAR TPC) in an experiment conducted at the Grand Accélérateur National d'Ions Lourds (GANIL). The completed decay scheme allows derivation of the reduced transition strengths, B(E2;10+→8+) and B(E4;10+→6+), for the two competing γ-ray transitions. By means of a comparison with their well-known ‘mirror transitions’ in Tz=+1 $^{54}$Fe, and aided by a variety of shell-model calculations in the fp model space, effective charges for E4 transitions near N=Z $^{56}$Ni can be deduced: επ≈1.40 and εν≈0.30. Mirror-energy differences are explored with various shell-model interactions and isospin-symmetry breaking terms. more...

Published
2022

17. Structure of Ca36 under the Coulomb Magnifying Glass

Author

Lalanne, L., primary, Sorlin, O., additional, Poves, A., additional, Assié, M., additional, Hammache, F., additional, Koyama, S., additional, Suzuki, D., additional, Flavigny, F., additional, Girard-Alcindor, V., additional, Lemasson, A., additional, Matta, A., additional, Roger, T., additional, Beaumel, D., additional, Blumenfeld, Y., additional, Brown, B. A., additional, Santos, F. De Oliveira, additional, Delaunay, F., additional, de Séréville, N., additional, Franchoo, S., additional, Gibelin, J., additional, Guillot, J., additional, Kamalou, O., additional, Kitamura, N., additional, Lapoux, V., additional, Mauss, B., additional, Morfouace, P., additional, Niikura, M., additional, Pancin, J., additional, Saito, T. Y., additional, Stodel, C., additional, and Thomas, J-C., additional more...

Published
2022
Full Text
View/download PDF

18. Mirror symmetry at mass A = 54: E4 effective charges near doubly magic 56Ni

Author

Rudolph, D., primary, Blank, B., additional, Giovinazzo, J., additional, Roger, T., additional, Alvarez-Pol, H., additional, Arokia Raj, A., additional, Ascher, P., additional, Caamaño-Fresco, M., additional, Caceres, L., additional, Cox, D.M., additional, Fernández-Domínguez, B., additional, Lois-Fuentes, J., additional, Gerbaux, M., additional, Grévy, S., additional, Grinyer, G.F., additional, Kamalou, O., additional, Mauss, B., additional, Mentana, A., additional, Pancin, J., additional, Pibernat, J., additional, Piot, J., additional, Sorlin, O., additional, Stodel, C., additional, Thomas, J.-C., additional, and Versteegen, M., additional more...

Published
2022
Full Text
View/download PDF

19. Neutron-proton pairing in the N=Z radioactive fp-shell nuclei 56Ni and 52Fe probed by pair transfer

Author

Le Crom, B., primary, Assié, M., additional, Blumenfeld, Y., additional, Guillot, J., additional, Sagawa, H., additional, Suzuki, T., additional, Honma, M., additional, Achouri, N.L., additional, Bastin, B., additional, Borcea, R., additional, Catford, W.N., additional, Clément, E., additional, Cáceres, L., additional, Caamaño, M., additional, Corsi, A., additional, De France, G., additional, Delaunay, F., additional, De Séréville, N., additional, Fernandez-Dominguez, B., additional, Fisichella, M., additional, Franchoo, S., additional, Georgiadou, A., additional, Gibelin, J., additional, Gillibert, A., additional, Hammache, F., additional, Kamalou, O., additional, Knapton, A., additional, Lapoux, V., additional, Leblond, S., additional, Macchiavelli, A.O., additional, Marqués, F.M., additional, Matta, A., additional, Ménager, L., additional, Morfouace, P., additional, Orr, N.A., additional, Pancin, J., additional, Pereira-Lopez, X., additional, Perrot, L., additional, Piot, J., additional, Pollacco, E., additional, Ramos, D., additional, Roger, T., additional, Rotaru, F., additional, Sánchez-Benítez, A.M., additional, Sénoville, M., additional, Sorlin, O., additional, Stanoiu, M., additional, Stefan, I., additional, Stodel, C., additional, Suzuki, D., additional, Thomas, J.-C., additional, and Vandebrouck, M., additional more...

Published
2022
Full Text
View/download PDF

20. Experimental investigation of ground-state properties of 7H with transfer reactions

Author

Caamaño, M., primary, Roger, T., additional, Moro, A.M., additional, Grinyer, G.F., additional, Pancin, J., additional, Bagchi, S., additional, Sambi, S., additional, Gibelin, J., additional, Fernández–Domínguez, B., additional, Itagaki, N., additional, Benlliure, J., additional, Cortina–Gil, D., additional, Farget, F., additional, Jacquot, B., additional, Pérez–Loureiro, D., additional, Pietras, B., additional, Raabe, R., additional, Ramos, D., additional, Rodríguez Tajes, C., additional, Savajols, H., additional, and Vandebrouck, M., additional more...

Published
2022
Full Text
View/download PDF

22. Elucidating the nature of the proton radioactivity and branching ratio on the first proton emitter discovered 53m Co.

Author

Sarmiento LG, Roger T, Giovinazzo J, Brown BA, Blank B, Rudolph D, Kankainen A, Alvarez-Pol H, Raj AA, Ascher P, Block M, Caamaño-Fresco M, Caceres L, Canete L, Cox DM, Eronen T, Fahlander C, Fernández-Domínguez B, Forsberg U, Lois-Fuentes J, Gerbaux M, Gerl J, Golubev P, Grévy S, Grinyer GF, Habermann T, Hakala J, Jokinen A, Kamalou O, Kojouharov I, Kolhinen VS, Koponen J, Kurz N, Lalović N, Lorenz C, Mauss B, Mentana A, Moore ID, Ortega Moral A, Pancin J, Papadakis P, Pibernat J, Piot J, Pohjalainen I, Reinikainen J, Rinta-Antila S, Schaffner H, Sorlin O, Stodel C, Thomas JC, Versteegen M, and Voss A more...

Abstract

The observation of a weak proton-emission branch in the decay of the 3174-keV 53m Co isomeric state marked the discovery of proton radioactivity in atomic nuclei in 1970. Here we show, based on the partial half-lives and the decay energies of the possible proton-emission branches, that the exceptionally high angular momentum barriers, [Formula: see text] and [Formula: see text], play a key role in hindering the proton radioactivity from 53m Co, making them very challenging to observe and calculate. Indeed, experiments had to wait decades for significant advances in accelerator facilities and multi-faceted state-of-the-art decay stations to gain full access to all observables. Combining data taken with the TASISpec decay station at the Accelerator Laboratory of the University of Jyväskylä, Finland, and the ACTAR TPC device on LISE3 at GANIL, France, we measured their branching ratios as b p1 = 1.3(1)% and b p2 = 0.025(4)%. These results were compared to cutting-edge shell-model and barrier penetration calculations. This description reproduces the order of magnitude of the branching ratios and partial half-lives, despite their very small spectroscopic factors., (© 2023. Springer Nature Limited.) more...

Published
2023
Full Text
View/download PDF

23. N=16 Magicity Revealed at the Proton Drip Line through the Study of ^{35}Ca.

Author

Lalanne L, Sorlin O, Poves A, Assié M, Hammache F, Koyama S, Suzuki D, Flavigny F, Girard-Alcindor V, Lemasson A, Matta A, Roger T, Beaumel D, Blumenfeld Y, Brown BA, Santos FO, Delaunay F, de Séréville N, Franchoo S, Gibelin J, Guillot J, Kamalou O, Kitamura N, Lapoux V, Mauss B, Morfouace P, Pancin J, Saito TY, Stodel C, and Thomas JC more...

Abstract

The last proton bound calcium isotope ^{35}Ca has been studied for the first time, using the ^{37}Ca(p,t)^{35}Ca two neutron transfer reaction. The radioactive ^{37}Ca nuclei, produced by the LISE spectrometer at GANIL, interacted with the protons of the liquid hydrogen target CRYPTA, to produce tritons t that were detected in the MUST2 detector array, in coincidence with the heavy residues Ca or Ar. The atomic mass of ^{35}Ca and the energy of its first 3/2^{+} state are reported. A large N=16 gap of 4.61(11) MeV is deduced from the mass measurement, which together with other measured properties, makes ^{36}Ca a doubly magic nucleus. The N=16 shell gaps in ^{36}Ca and ^{24}O are of similar amplitude, at both edges of the valley of stability. This feature is discussed in terms of nuclear forces involved, within state-of-the-art shell model calculations. Even though the global agreement with data is quite convincing, the calculations underestimate the size of the N=16 gap in ^{36}Ca by 840 keV. more...

Published
2023
Full Text
View/download PDF

24. Structure of ^{36}Ca under the Coulomb Magnifying Glass.

Author

Lalanne L, Sorlin O, Poves A, Assié M, Hammache F, Koyama S, Suzuki D, Flavigny F, Girard-Alcindor V, Lemasson A, Matta A, Roger T, Beaumel D, Blumenfeld Y, Brown BA, Santos FO, Delaunay F, de Séréville N, Franchoo S, Gibelin J, Guillot J, Kamalou O, Kitamura N, Lapoux V, Mauss B, Morfouace P, Niikura M, Pancin J, Saito TY, Stodel C, and Thomas JC more...

Abstract

Detailed spectroscopy of the neutron-deficient nucleus ^{36}Ca was obtained up to 9 MeV using the ^{37}Ca(p,d)^{36}Ca and the ^{38}Ca(p,t)^{36}Ca transfer reactions. The radioactive nuclei, produced by the LISE spectrometer at GANIL, interacted with the protons of the liquid hydrogen target CRYPTA, to produce light ejectiles (the deuteron d or triton t) that were detected in the MUST2 detector array, in coincidence with the heavy residues identified by a zero-degree detection system. Our main findings are (i) a similar shift in energy for the 1_{1}^{+} and 2_{1}^{+} states by about -250  keV, as compared with the mirror nucleus ^{36}S; (ii) the discovery of an intruder 0_{2}^{+} state at 2.83(13) MeV, which appears below the first 2^{+} state, in contradiction with the situation in ^{36}S; and (iii) a tentative 0_{3}^{+} state at 4.83(17) MeV, proposed to exhibit a bubble structure with two neutron vacancies in the 2s_{1/2} orbit. The inversion between the 0_{2}^{+} and 2_{1}^{+} states is due to the large mirror energy difference (MED) of -516(130)  keV for the former. This feature is reproduced by shell model calculations, using the sd-pf valence space, predicting an almost pure intruder nature for the 0_{2}^{+} state, with two protons (neutrons) being excited across the Z=20 magic closure in ^{36}Ca (^{36}S). This mirror system has the largest MEDs ever observed, if one excludes the few cases induced by the effect of the continuum. more...

Published
2022
Full Text
View/download PDF