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1. Detailed spectroscopy of doubly magic $^{132}$Sn

Author

Benito, J., Fraile, L. M., Korgul, A., Piersa, M., Adamska, E., Andreyev, A. N., Álvarez-Rodríguez, R., Barzakh, A. E., Benzoni, G., Berry, T., Borge, M. J. G., Carmona, M., Chrysalidis, K., Costache, C., Cubiss, J. G., Goodacre, T. Day, De Witte, H., Fedorov, D. V., Fedosseev, V. N., Fernández-Martínez, G., Fijałkowska, A., Fila, M., Fynbo, H., Galaviz, D., Galve, P., García-Díez, M., Greenlees, P. T., Grzywacz, R., Harkness-Brennan, L. J., Henrich, C., Huyse, M., Ibáñez, P., Illana, A., Janas, Z., Jolie, J., Judson, D. S., Karayonchev, V., Kicinska-Habior, M., Konki, J., Kurcewicz, J., Lazarus, I., Lica, R., López-Montes, A., Lund, M., Mach, H., Madurga, M., Marroquín, I., Marsh, B., Martínez, M. C., Mazzocchi, C., Marginean, N., Marginean, R., Miernik, K., Mihai, C., Mihai, R. E., Nácher, E., Negret, A., Olaizola, B., Page, R. D., Paulauskas, S. V., Pascu, S., Perea, A., Pucknell, V., Rahkila, P., Raison, C., Rapisarda, E., Régis, J. -M., Rezynkina, K., Rotaru, F., Rothe, S., Sánchez-Parcerisa, D., Sánchez-Tembleque, V., Schomacker, K., Simpson, G. S., Sotty, Ch., Stan, L., Stanoiu, M., Stryjczyk, M., Tengblad, O., Turturica, A., Udías, J. M., Van Duppen, P., Vedia, V., Villa-Abaunza, A., Viñals, S., Walters, W. B., Wadsworth, R., Warr, N., Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Université Grenoble Alpes (UGA), and IDS

Subjects
Astrophysics::High Energy Astrophysical Phenomena, FOS: Physical sciences, Nuclear Physics - Experiment, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment (nucl-ex), nucl-ex, Nuclear Structure, Nuclear Experiment
Abstract

The structure of the doubly magic $^{132}_{50}$Sn$_{82}$ has been investigated at the ISOLDE facility at CERN, populated both by the $\beta^-$decay of $^{132}$In and $\beta^-$-delayed neutron emission of $^{133}$In. The level scheme of $^{132}$Sn is greatly expanded with the addition of 68 $\gamma$-transitions and 17 levels observed for the first time in the $\beta$ decay. The information on the excited structure is completed by new $\gamma$-transitions and states populated in the $\beta$-n decay of $^{133}$In. Improved delayed neutron emission probabilities are obtained both for $^{132}$In and $^{133}$In. Level lifetimes are measured via the Advanced Time-Delayed $\beta\gamma\gamma$(t) fast-timing method. An interpretation of the level structure is given based on the experimental findings and the particle-hole configurations arising from core excitations both from the \textit{N} = 82 and \textit{Z} = 50 shells, leading to positive and negative parity particle-hole multiplets. The experimental information provides new data to challenge the theoretical description of $^{132}$Sn., Comment: 19 pages, 11 figures. Accepted for publication in Phys. Rev. C

Published
2020
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2. Decay studies of the long-lived states in $^{186}$Tl

Author

Stryjczyk, M., Andel, B., Andreyev, A. N., Cubiss, J., Pakarinen, J., Rezynkina, K., Van Duppen, P., Antalic, S., Berry, T., Borge, M. J. G., Clisu, C., Cox, D. M., De Witte, H., Fraile, L. M., Fynbo, H. O. U., Gaffney, L. P., Harkness-Brennan, L. J., Huyse, M., Illana, A., Judson, D. S., Konki, J., Kurcewicz, J., Lazarus, I., Lica, R., Madurga, M., Marginean, N., Marginean, R., Mihai, C., Mosat, P., Nacher, E., Negret, A., Ojala, J., Ovejas, J. D., Page, R. D., Papadakis, P., Pascu, S., Perea, A., Podolyák, Zs., Pucknell, V., Rapisarda, E., Rotaru, F., Sotty, C., Tengblad, O., Vedia, V., Viñals, S., Wadsworth, R., Warr, N., Wrzosek-Lipska, K., Institut Pluridisciplinaire Hubert Curien (IPHC), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS), and IDS

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

Decay spectroscopy of the long-lived states in $^{186}$Tl has been performed at the ISOLDE Decay Station at ISOLDE, CERN. The $\alpha$ decay from the low-spin $(2^-)$ state in $^{186}$Tl was observed for the first time and a half-life of $3.4^{+0.5}_{-0.4}$ s was determined. Based on the $\alpha$-decay energy, the relative positions of the long-lived states were fixed, with the $(2^-)$ state as the ground state, the $7^{(+)}$ state at 77(56)~keV and the $10^{(-)}$ state at 451(56) keV. The level scheme of the internal decay of the $^{186}$Tl($10^{(-)}$) state ($T_{1/2} = 3.40(9)$ s), which was known to decay solely through emission of 374 keV $\gamma$-ray transition, was extended and a lower-limit for the $\beta$-decay branching $b_\beta > 5.9(3)\%$ was determined. The extracted retardation factors for the $\gamma$ decay of the $10^{(-)}$ state were compared to the available data in neighboring odd-odd thallium isotopes indicating the importance of the $\pi d_{3/2}$ shell in the isomeric decay and significant structure differences between $^{184}$Tl and $^{186}$Tl., Comment: 10 pages, 12 figures

Published
2020
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3. $\alpha$-decay properties of $^{200,202}$FR

Author

Ghys, L., Andreyev, A. N., Huyse, M., Van Duppen, P., Antalic, S., Barzakh, A., Capponi, L., Cocolios, T. E., Cubiss, J., Derkx, X., De Witte, H., Elseviers, J., Hessberger, F. P., Kalaninová, Z., Köster, U., Lane, J. F. W., Liberati, V., Mitsuoka, S., Nagame, Y., Nishio, K., Ota, S., Pauwels, D., Page, R. D., Popescu, L., Radulov, D., Rajabali, M. M., Rapisarda, E., Sandhu, K., Truesdale, V. L., Van den Bergh, P., Wakabayashi, Y., 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)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Institut Laue-Langevin (ILL), ILL, and Normandie Université (NU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
ddc:530, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment, Nuclear Structure
Abstract

International audience; Background: The neutron-deficient lead region provides a range of nuclear phenomena, including isomerism at low energies. This phenomenon can be studied by α decay because the degree of hindrance of α decay provides information on the change in nuclear structure of connected states. Purpose: The aim of this work was to investigate the α-decay properties of $^{200,202}$FR and daughter products. Method: Neutron-deficient francium nuclei are produced at ISOLDE-CERN bombarding a UCx target with 1.4 GeV protons. Surface ionization and mass-separation techniques were employed to provide a pure radioactive ion beam at a radiation-detection setup. Results: Due to the very high statistics and the high beam purity, improved decay data for $^{202}$FR and its daughters were obtained. In particular, this data set allowed us to identify many fine-structure α lines with a relative reduced α-decay width up to five orders of magnitude lower as the strongest ground-to-ground state or isomeric-to-isomeric state α-decay transition. In addition, several half-life values were extracted with similar or better precision as compared with the literature. Conclusions: The observation of crossover transitions positioned the isomeric high-spin level of $^{198}$At at an excitation energy of 265(3) keV. Half-life values of 4.47(5) s and 1.28(10) s were extracted for the ground state and isomeric state of $^{198}$At and 52(3) ms for the ground-state decay of $^{200}$FR. Furthermore, α-decay schemes for Fr202 and its daughter $^{198}$At could be constructed.

Published
2019
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4. First Accurate Normalization of the $\beta$-delayed $\alpha$ Decay of $^{16}$N and Implications for the $^{12}$C$(\alpha,\gamma)^{16}$O Astrophysical Reaction Rate

Author

Kirsebom, O. S., Tengblad, O., Lica, R., Munch, M., Riisager, K., Fynbo, H. O. U., Borge, M. J. G., Madurga, M., Marroquin, I., Andreyev, A. N., Berry, T. A., Christensen, E. R., Fernández, P. Díaz, Doherty, D. T., Van Duppen, P., Fraile, L. M., Gallardo, M. C., Greenlees, P. T., Harkness-Brennan, L. J., Hubbard, N., Huyse, M., Jensen, J. H., Johansson, H., Jonson, B., Judson, D. S., Konki, J., Lazarus, I., Lund, M. V., Marginean, N., Marginean, R., Perea, A., Mihai, C., Negret, A., Page, R. D., Pucknell, V., Rahkila, P., Sorlin, O., Sotty, C., Swartz, J. A., Sørensen, H. B., Törnqvist, H., Vedia, V., Warr, N., De Witte, H., 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), 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 ), and Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)

Subjects
ddc:530, Nuclear Physics - Experiment, [ PHYS.NEXP ] Physics [physics]/Nuclear Experiment [nucl-ex], [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], nucl-ex, Nuclear Experiment, Nuclear Physics
Abstract

The $^{12}\text{C}(\alpha,\gamma){}^{16}\text{O}$ reaction plays a central role in astrophysics, but its cross section at energies relevant for astrophysical applications is only poorly constrained by laboratory data. The reduced $\alpha$ width, $\gamma_{11}$, of the bound $1^-$ level in $^{16}$O is particularly important to determine the cross section. The magnitude of $\gamma_{11}$ is determined via sub-Coulomb $\alpha$-transfer reactions or the $\beta$-delayed $\alpha$ decay of $^{16}$N, but the latter approach is presently hampered by the lack of sufficiently precise data on the $\beta$-decay branching ratios. Here we report improved branching ratios for the bound $1^-$ level [$b_{\beta,11} = (5.02\pm 0.10)\times 10^{-2}$] and for $\beta$-delayed $\alpha$ emission [$b_{\beta\alpha} = (1.59\pm 0.06)\times 10^{-5}$]. Our value for $b_{\beta\alpha}$ is 33% larger than previously held, leading to a substantial increase in $\gamma_{11}$. Our revised value for $\gamma_{11}$ is in good agreement with the value obtained in $\alpha$-transfer studies and the weighted average of the two gives a robust and precise determination of $\gamma_{11}$, which provides significantly improved constraints on the $^{12}$C$(\alpha,\gamma)$ cross section in the energy range relevant to hydrostatic He burning., Comment: 6 pages, 5 figures

Published
2018
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5. De-excitation of the strongly coupled band in 177Au and implications for core intruder configurations in the light Hg isotopes

Author

Venhart, M., Ali, F. A., Ryssens, W., Wood, J. L., Joss, D. T., Andreyev, A. N., Auranen, K., Bally, B., Balogh, M., Bender, M., Carroll, R. J., Easton, J. L., Greenlees, P. T., Grahn, T., Heenen, P.-H., Herzáifmmode ecknelse n, A., Jakobsson, U., Julin, R., Juutinen, S., Kifmmode lelse ifmmode eckcelse c, D., Konki, J., Lawrie, E., Leino, M., Matouifmmode eckselse sek, V., McPeake, C. G., O'Donnell, D., Page, R. D., Pakarinen, J., Partanen, J., Peura, P., Rahkila, P., Ruotsalainen, P., Sandzelius, M., Sarén, J., B., Sayifmmode gelse, Sedlák, M., Scholey, C., Sorri, J., Stolze, S., Thornthwaite, A., Uusitalo, J., Veselský, M., Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Centre d'Etudes Nucléaires de Bordeaux Gradignan (CENBG), Université Sciences et Technologies - Bordeaux 1 (UB)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Nucléaire de Lyon (IPNL), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université Sciences et Technologies - Bordeaux 1-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), and Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)

Subjects
atomit, nuklidit, Nuclear Theory, strongly coupled band, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], core intruder configurations, Nuclear Experiment, ydinfysiikka
Abstract

International audience; Excited states in the proton-unbound nuclide $^{177}$Au were populated in the $^92}$Mo($^{88}$Sr, p2n) reaction and identified using the Jurogam-II and GREAT spectrometers in conjunction with the RITU gas-filled separator at the University of Jyväskylä Accelerator Laboratory. A strongly coupled band and its decay path to the 11/2−α-decaying isomer have been identified using recoil-decay tagging. Comparisons with cranked Hartree-Fock-Bogoliubov (HFB) calculations based on Skyrme energy functionals suggest that the band has a prolate deformation and is based upon coupling the odd 1h11/2 proton hole to the excited 02+ configuration in the $^{178}$Hg core. Although these configurations might be expected to follow the parabolic trend of core Hg(02+) states as a function of neutron number, the electromagnetic decay paths from the strongly coupled band in $^{177}$Au are markedly different from those observed in the heavier isotopes above the midshell. This indicates that a significant change in the structure of the underlying A+1Hg core occurs below the neutron midshell.

Published
2017
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6. β-delayed fission of 180Tl

Author

Elseviers, J., Andreyev, A. N., Fedorov, D., Fedosseev, V. N., Franchoo, S., Ghys, L., Heredia, J. A., Ivanov, O., Köster, U., Marsh, B. A., Nishio, K., Page, R. D., Huyse, M., Patronis, N., Seliverstov, M. D., Tsekhanovich, I., Van den Bergh, P., Van De Walle, J., Venhart, M., Vermote, S., Veselský, M., Wagemans, C., Van Duppen, P., Antalic, S., Barzakh, A., Bree, N., Cocolios, T. E., Comas, V. F., Diriken, J., Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Institut Laue-Langevin (ILL), ILL, Instituut voor Kern-en Stralingsfysica (IKS), Catholic University of Leuven - Katholieke Universiteit Leuven (KU Leuven), Aval du cycle et Energie Nucléaire (ACEN), Centre d'Etudes Nucléaires de Bordeaux Gradignan (CENBG), Université Sciences et Technologies - Bordeaux 1-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Sciences et Technologies - Bordeaux 1-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and European Organization for Nuclear Research (CERN)

Subjects
Isolde, SURFACE-BARRIER DETECTORS, Physics and Astronomy, fission, ddc:530, fission fragment mass distribution, NUCLEAR-FISSION, MASS, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment, FRAGMENTS, HEAVY-IONS
Abstract

The detailed analysis of the beta-delayed fission data of Tl-180 is presented. The experiment was performed by producing a pure beam of Tl-180 by means of highly selective resonance laser ionization followed by mass separation with the ISOLDE (CERN, Geneva) isotope separator. A surprising asymmetric mass distribution of fission fragments from Hg-180, the daughter of Tl-180 beta decays, was observed. Here, the energy calibration of the silicon detectors, which is crucial for a proper determination of the fission fragments' energy and mass split, is presented and the total kinetic energy and its dependence on the mass split ratio is discussed. A more precise beta-delayed fission probability P-beta DF(Tl-180) = 3.2(2) x 10(-3)% was deduced.

Published
2013
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7. β-delayed fission of $^{192,194}At$

Author

Andreyev, A. N., Antalic, S., Ackermann, D., Bianco, L., Franchoo, S., Heinz, S., Hessberger, F. P., Hofmann, S., Huyse, M., Kalaninova, Z., Kojouharov, I., Kindler, B., Lommel, B., Mann, R., Nishio, K., Page, R. D., Ressler, J. J., Streicher, B., Saro, S., Sulignano, B., Van Duppen, P., Institut de Physique Nucléaire d'Orsay (IPNO), and Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)

Subjects
Nuclear Theory, ddc:530, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment
Abstract

By using the recoil-fission correlation technique, the exotic process of beta-delayed fission (βDF) was unambiguously identified in the very neutron-deficient nuclei 192,194At in experiments at the velocity filter SHIP at Gesellschaft f¨ur Schwerionenforschung (GSI). The upper limits for the total kinetic energy release in fission of 192,194Po, being the daughter products of 192,194At after β+/EC decay, were estimated. The possibility of an unusually high βDF probability for 192At is discussed. ispartof: Physical Review C, Nuclear Physics vol:87 issue:1 status: published

Published
2013
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8. g-factor measurements of isomeric states in neutron rich nuclei

Author

Georgi Georgiev, Neyens, G., Hass, M., Balabanski, D. L., Bingham, C., Borcea, C., Coulier, N., Coussement, R., Daugas, J. M., France, G., Santos, F. D., Gorska, M., Grawe, H., Grzywacz, R., Lewitowicz, M., Mach, H., Matea, I., Page, R. D., Pfutzner, M., Penionzhkevich, Y. E., Podolyak, Z., Regan, P. H., Rykaczewski, K., Sawicka, M., Smirnova, N. A., Sobolev, Y., Stanoiu, M., Teughels, S., Vyvey, K., 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), and Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)

Subjects
Physics, Electromagnet, Magnetic moment, Spectrometer, Isotope, 020206 networking & telecommunications, 02 engineering and technology, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], law.invention, Magnetic field, Nuclear physics, Microsecond, law, Nuclear magnetic moment, 0202 electrical engineering, electronic engineering, information engineering, 020201 artificial intelligence & image processing, Neutron, Atomic physics, Nuclear Experiment
Abstract

We report on the first application of the TDPAD method to measure the g factor of neutron‐rich isomeric states, produced and aligned in a projectile fragmentation reaction. The feasibility of similar measurement opens up a new, unexplored region of the nuclear chart for studies of the magnetic moments of microsecond isomers. Nuclei around 68Ni were produced following the fragmentation of 61.6 MeV/u 76Ge on a 145 mg/cm2 Be target. The isotopes of interest were selected using the LISE spectrometer at GANIL, Caen, France, and were implanted in a high purity Cu foil fixed between the poles of an electromagnet. Two Ge Clover detectors, positioned in a plane perpendicular to the holding magnetic field, were used to observe the rotation of the nuclear spin ensemble and to derive the experimental R(t) function. The experimental result for the isomer in 67Ni (Jπ = 9/2+, T1/2 = 13.3 μs, Ex = 1007 keV), |g| = 0.125(6), is presented herein and is also compared to the theoretical expectations.

Published
2002
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9. Spectroscopy of tranferium nuclei: $^{252}$No

Author

R-D, Herzberg, Amzal, N., Becker, F., Butler, P. A., Chewter, A. J. C., Cocks, J. F. C., Dorvaux, O., Eskola, K., Gerl, J., Greenlees, P. T., Hammond, N. J., Karl Hauschild, Helariutta, K., Hessberger, F., Houry, M., Jones, P. M., Julin, R., Juutinen, S., Kankaanpaa, H., Kettunen, H., Khoo, T. L., Korten, W., Kuusiniemi, P., Le Coz, Y., Leino, M., Leppaenen, A. P., Lister, C. J., Lucas, R., Muikku, M., Nieminen, P., Page, R. D., Page, T., Rahkila, P., Reiter, P., Ch. Schlegel, Scholey, C., Sletten, G., Stézowski, O., Ch. Theisen, Trzaska, W. H., Uusitalo, J., Wollersheim, H. J., Institut de Physique Nucléaire de Lyon (IPNL), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), and Flores, Sylvie

Subjects
[PHYS.NEXP] Physics [physics]/Nuclear Experiment [nucl-ex], [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]
Abstract

Matière Nucléaire

Published
2002

10. Towards prolate deformed ground state in polonium nuclei: in-beam and alpha-decay studies of $^{190,191}$Po

Author

Andreyev, A. N., Huyse, M., Van-Duppen, P., Dorvaux, O., Greenlees, P., Helariutta, K., Jones, P., Julin, R., Juutinen, S., Kankaanpaa, H., Keenan, A., Kettunen, H., Kuusiniemi, P., Leino, M., Muikku, M., Nieminen, P., Rahkila, P., Uusitalo, J., Wyss, R., Karl Hauschild, Hurstel, A., Le Coz, Y., Page, R. D., Smith, M., Eskola, K., Institut de Recherches Subatomiques (IReS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Cancéropôle du Grand Est-Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS), and Heyd, Yvette

Subjects
[PHYS.NEXP] Physics [physics]/Nuclear Experiment [nucl-ex], [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]
Published
2001

11. In-beam and decay studies of neutron-deficient isotopes of heavy elements

Author

Leino, M., Allatt, R. G., Cocks, J. F. C., Dorvaux, O., Eskola, K., Greenlees, P. T., Helariutta, K., Jones, P. M., Julin, R., Juutinen, S., Kankaanpää, H., Keenan, A., Kettunen, H., Pasi Kuusiniemi, Muikku, M., Nleminen, P., Page, R. D., Rahkila, P., Savelius, A., Trzaska, W. H., Uusitalo, J., Institut de Recherches Subatomiques (IReS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Cancéropôle du Grand Est-Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS), and Heyd, Yvette

Subjects
[PHYS.NEXP] Physics [physics]/Nuclear Experiment [nucl-ex], [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]
Published
1999

12. Observation of the Z = N + 1 nuclei $^{77}_{39}$Y, $^{79}_{40}$Zr, and $^{83}_{42}$Mo

Author

JANAS, Z., CHANDLER, C., BLANK, Bertram, REGAN, P-H., BRUCE, A-M., CATFORD, W-N., CURTIS, N., CZAJKOWSKI, S., DESSAGNE, P., FLEURY, Agnès, GELLETLY, W., GIOVINAZZO, J., GRZYWACZ, R., LEWITOWICZ, M., LONGOUR, C., MARCHAND, C., MIEHE, C., ORR, N.A., PAGE, R-D., PEARSON, C-J., PRAVIKOFF, M-S., REED, A-T., SAINT-LAURENT, M.G., SHEIKH, J-A., VINCENT, S-M., WADSWORTH, R., WARNER, D-D., WINFIELD, J-S., Centre d'Etudes Nucléaires de Bordeaux Gradignan (CENBG), Université Sciences et Technologies - Bordeaux 1-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Recherches Subatomiques (IReS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Cancéropôle du Grand Est-Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS), Grand Accélérateur National d'Ions Lourds (GANIL), Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), 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), 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), Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), and Université Sciences et Technologies - Bordeaux 1 (UB)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
1999
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13. Decay and in-beam studies of neutron-deficient Po and Ra isotopes at JYFL

Author

Leino, M., Allatt, R. G., Andreyev, A. N., Cocks, J. F. C., Olivier Dorvaux, Enqvist, T., Eskola, K., Helariutta, K., Huyse, M., Jones, P. M., Julin, R., Juutinen, S., Kankaanpää, H., Keenan, A., Kettunen, H., Kuusiniemi, P., Muikku, M., Page, R. D., Rahkila, P., Savelius, A., Trzaska, W. H., Uusitalo, J., Duppen, P., Institut de Recherches Subatomiques (IReS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Cancéropôle du Grand Est-Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS), and Heyd, Yvette

Subjects
[PHYS.NEXP] Physics [physics]/Nuclear Experiment [nucl-ex], [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]
Abstract

An extensive program to study the production, decay properties, and nuclear structure of very neutron-deficient polonium and radium nuclei is underway at the Department of Physics, University of Jyvaskyla, Finland (JYFL). The main tools used in these studies are the gas-filled recoil separator RITU and various germanium gamma-ray arrays. In the course of these studies, among others the following new isotopes have been produced: Ra-204, Ra-203, and Ra-202. Isomeric alpha decaying states have been discovered in Ra-203 and Po-191. Fine structure in the decay of Po-192 to the oblate and prolate band heads in Pb-188 has been observed. In-beam gamma-ray spectra have been, for the first time, measured for Po-192, Ra-206, Ra-208, and Ra-210. Development of collectivity in nuclei in the Po-Ra region and the systematics of reduced alpha widths will be discussed. peerReviewed

Published
1998

14. First observation of excited states in $^{226}$U

Author

Greenlees, P-T., Amzal, N., Butler, P-A., Cann, K-J., Cocks, J-F-C., Hawcroft, D., Jones, G-D., Page, R-D., Andreev, A., Enqvist, T., Fallon, P., Gall, B.J.P., Guttormsen, M., Helariutta, K., Hoellinger, F., Jones, P-M., Julin, R., Juutinen, S., Kankaanpaa, H., Kettunen, H., Kuusiniemi, P., Leino, M., Messelt, S., Muikku, M., Savelius, A., Schiller, A., Siem, S., Trzaska, W-H., Tveter, T., Uusitalo, J., Institut de Recherches Subatomiques (IReS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Cancéropôle du Grand Est-Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS), and Heyd, Yvette

Subjects
[PHYS.NEXP] Physics [physics]/Nuclear Experiment [nucl-ex], [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]
Published
1998

15. In-beam gamma-ray spectroscopy above $^{100}$Sn using the new technique of recoil decay tagging

Author

Paul, E. S., Woods, P. J., Davinson, T., Page, R. D., Sellin, P. J., Beausang, C. W., Clark, R. M., Cunningham, R. A., Forbes, S. A., Fossan, D. B., Gizon, A., Gizon, J., Karl Hauschild, Hibbert, I. M., James, A. N., Lafosse, D. R., Lazarus, I., Schnare, H., Simpson, J., Wadsworth, R., Waring, M. P., Laboratoire de Physique Subatomique et de Cosmologie (LPSC), and Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]
Published
1995

16. Deformed intruder band in 112Te: First evidence for rotational behavior in the tellurium isotopes

Author

Paul, E. S., Beausang, C. W., Forbes, S. A., Gale, S. J., James, A. N., Jones, P. M., Joyce, M. J., Andrews, H. R., Janzen, V. P., Radford, D. C., Ward, D., Clark, R. M., Karl Hauschild, Hibbert, I. M., Wadsworth, R., Cunningham, R. A., Simpson, J., Davinson, T., Page, R. D., Sellin, P. J., Woods, P. J., Fossan, D. B., Lafosse, D. R., Schnare, H., Waring, M. P., Gizon, A., Gizon, J., Drake, T. E., Degraaf, J., Pilotte, S., Laboratoire de Physique Subatomique et de Cosmologie (LPSC), and Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]
Published
1994

17. Identification of excited states in226U

Author

Greenlees, P. T., Amzal, N., Peter Butler, Cann, K. J., Cocks, J. F. C., Hawcroft, D., Jones, G. D., Page, R. D., Andreev, A., Enqvists, T., Fallon, P., Gall, B., Guttormsen, M., Helariutta, K., Hessberger, P. P., Hoellinger, F., Jones, P., Julin, R., Juutinen, S., Kankaanpää, H., Kettunen, H., Kuusiniemi, P., Leino, M., Messelt, S., Muikku, M., Savelius, A., Schiller, A., Siem, S., Trzaska, W. H., Tveter, T., Uusitalo, J., Heyd, Yvette, Institut de Recherches Subatomiques (IReS), and Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Cancéropôle du Grand Est-Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS)

Subjects
[PHYS.NEXP] Physics [physics]/Nuclear Experiment [nucl-ex], Physical Sciences, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear & Particles Physics, Mathematical Sciences
Abstract

Two experiments have been performed at the Accelerator Laboratory of the Department of Physics, University of Jyväskylä, Finland, and are reported here. The first experiment was a recoil-decay tagging study intended to delineate the level scheme of 226U for the first time. The subsequent experiment, the observation of fine structure in the a decay of 230Pu, was to obtain an improved measurement of the excitation energy of the first excited 2+ state, which was tentatively assigned in the first experiment.

18. Intruder bands in (Z = 53) $^{113}$I : band termination interpretation

Author

Waring, M. P., Paul, E. S., Beausang, C. W., Clark, R. M., Cunningham, R. A., Davinson, T., Forbes, S. A., Fossan, D. B., Gale, S. J., Gizon, A., Gizon, J., Karl Hauschild, Hibbert, I. M., James, A. N., Jones, P. M., Joyce, M. J., Lafosse, D. R., Page, R. D., Ragnarsson, I., Schnare, H., Sellin, P. J., Simpson, J., Vaska, P., Wadsworth, R., Woods, P. J., Laboratoire de Physique Subatomique et de Cosmologie (LPSC), and Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]

19. Observation of isomeric states in neutron deficient A~80 nuclei following the projectile fragmentation of 92Mo

Author

Chandler, C., Regan, P. H., Blank, B., Pearson, C. J., Alison Bruce, Catford, W. N., Curtis, N., Czahjiwski, S., Ph. Dessagne, Fleury, A., Gelletly, W., Giovinazzo, J., Grzywacz, R., Janas, Z., Lewitowica, M., Marchand, C., Ch. Miehe, Orr, N. A., Page, R. D., Pravikoff, M. S., Reed, A. T., Saint-Laurent, M. G., Vincent, S. M., Wadsworth, R., Warner, D. D., Winfield, J. S., Xu, F., Centre d'Etudes Nucléaires de Bordeaux Gradignan (CENBG), Université Sciences et Technologies - Bordeaux 1-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Recherches Subatomiques (IReS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Cancéropôle du Grand Est-Université Louis Pasteur - Strasbourg I-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), Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), and Université Sciences et Technologies - Bordeaux 1 (UB)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]
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20. Probing single-particle structures beyond the proton drip line

Author

R. D. Page, L. Bianco, I. G. Darby, D. T. Joss, T. Grahn, R.-D. Herzberg, J. Pakarinen, J. Thomson, J. Uusitalo, S. Eeckhaudt, P. T. Greenlees, P. M. Jones, R. Julin, S. Juutinen, S. Ketelhut, M. Leino, A.-P. Leppänen, M. Nyman, P. Rahkila, J. Sarén, C. Scholey, A. Steer, M. Venhart, J. Simpson, J. S. Al-Khalili, A. J. Cannon, P. D. Stevenson, S. Ertürk, B. Gall, B. Hadinia, Lídia S. Ferreira, Paramasivan Arumugan, Département Recherches Subatomiques (DRS-IPHC), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS), Lídia S. Ferreira, Paramasivan Arumugan, Ferreira, LS, Arumugam, P, Scholey, Catherine -- 0000-0002-8743-6071, Stevenson, Paul -- 0000-0003-2645-2569, Pakarinen, Janne -- 0000-0001-8944-8757, Grahn, Tuomas -- 0000-0002-6255-2279, Jones, Pete -- 0000-0001-7480-6603, and [Page, R. D. -- Bianco, L. -- Darby, I. G. -- Joss, D. T. -- Grahn, T. -- Herzberg, R. -D. -- Pakarinen, J. -- Thomson, J.] Univ Liverpool, Dept Phys, Oliver Lodge Lab, Liverpool L69 7ZE, Merseyside, England -- [Uusitalo, J. -- Eeckhaud, S. -- Greenlees, P. T. -- Jones, P. M. -- Julin, R. -- Juutinen, S. -- Ketelhut, S. -- Leino, M. -- Leppanen, A. -P. -- Nyman, M. -- Rahkila, P. -- Saren, J. -- Scholey, C. -- Steer, A. -- Venhart, M.] Univ jyvaskyla, Dept Phys, FIN-40014 Jyvaskyla, Finland -- [Simpson, J.] STFC, Daresbury Lab, Warrington WA4 4AD, Cheshire, England -- [Al-Khalili, J. S. -- Cannon, A. J. -- Stevenson, P. D.] Univ Surrey, Dept Phys, Guildford GU2 7XH, Surrey, England -- [Erturk, S.] Nigde Univ, Nigde, Turkey -- [Gall, B.] ULP Strasbourg, CNRS IN2P, IPHC, F-67037 Strasbourg 2, France -- [Hadinia, B.] AlbaNova Univ Ctr, Royal Inst Technol, S-10691 Stockholm, Sweden

Subjects
Proton, Nuclear Theory, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, 7. Clean energy, Nuclear physics, 0103 physical sciences, nuclei with mass number 150 to 189, Neutron, alpha-decay, radioactive decay periods, Proton emission, branching ratio. Re-159, 010306 general physics, Nuclear Experiment, Physics, RADIOACTIVITY Re-159(alpha)[from Cd-106(Ni-58,p4n)], Ta-155 deduced levels, Ta-155(p)[from Re-159 a decay], 010308 nuclear & particles physics, Alpha particle, previous Ta-155 study, Charged particle, comparisons with neighbouring nuclides, measured E-alpha, E-p, T-1/2, 23.50.+z, 23.60.+e, 27.70.+q, J, pi configurations, Alpha decay, Atomic physics, Nucleon, Radioactive decay, proton emission decay
Abstract

International Conference on Proton Emitting Nuclei and Related Topics -- JUN 17-23, 2007 -- Lisbon, PORTUGAL, WOS: 000252267300021, Single-particle energies have been investigated in the closed neutron shell proton emitter Ta-155. The Ta-155 nuclei were populated through the alpha decay of Re-159, which has been observed for the first time. The (159)Rc nuclei were produced in reactions of 300 MeV Ni-58 ions with an isotopically enriched Cd-106 target, separated in-flight using the RITU separator and implanted into the GREAT spectrometer. The Re-159 a decay emanates from the proton-emitting pi h(11/2) state and populates a state in Ta-155 which decays by the emission of a proton from a pi h(11/2) orbital. The results fit in with the systematics of proton and alpha-particle separation energies in the region, but disagree with the previously reported decay properties of Ta-155., Fundacao Ciencia & Tecnol, Minist Ciencia & Tecnol, Fundacao Calouste Gulbenklan, Fundacao Luso Americana, UK Engineering and Physical Sciences Research Council; Swedish Natural Science Research Council; Academy of Finland under the Firmish Centre of Excellence Programme (project 44875 Nuclear and Condensed Matter Physics Programme at JYFL); European Union Sixth Framework contract EURONS [RII3-CT-2004-506065]; European Union Marie Curie Programme [HPMT-CT-2001-00250], The authors would like to thank the technical staff at the Accelerator Laboratory at the University of Jyvaskyla for their excellent support and to Paul Morrall from Daresbury Laboratory for making the targets. This work has been supported by the UK Engineering and Physical Sciences Research Council; the Swedish Natural Science Research Council; the Academy of Finland under the Firmish Centre of Excellence Programme (project 44875 Nuclear and Condensed Matter Physics Programme at JYFL); the European Union Sixth Framework contract EURONS (contract RII3-CT-2004-506065) and the European Union Marie Curie Programme (contract HPMT-CT-2001-00250).

Published
2007
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