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13 results on '"Pucknell, V. P. E."'

1. Commissioning of the BRIKEN detector for the measurement of very exotic beta-delayed neutron emitters

Author

Tolosa-Delgado, A., Agramunt, J., Tain, J. L., Algora, A., Domingo-Pardo, C., Morales, A. I., Rubio, B., Tarifeno-Saldivia, A., Calvino, F., Cortes, G., Brewer, N. T., Rasco, B. C., Rykaczewski, K. P., Stracener, D. W., Allmond, J. M., Grzywacz, R., Yokoyama, R., Singh, M., King, T., Madurga, M., Nishimura, S., Phong, V. H., Go, S., Liu, J., Matsui, K., Sakurai, H., Kiss, G. G., Isobe, T., Baba, H., Kubono, S., Fukuda, N., Ahn, D. S., Shimizu, Y., Sumikama, T., Suzuki, H., Takeda, H., Soderstrom, P. A., Takechi, M., Bruno, C. G., Davinson, T., Griffin, C. J., Hall, O., Kahl, D., Woods, P. J., Coleman-Smith, P. J., Labiche, M., Lazarus, I., Morrall, P., Pucknell, V. F. E., Simpson, J., Thomas, S. L., Prydderch, M., Harkness-Brennan, L. J., Page, R. D., Dillmann, I., Caballero-Folch, R., Saito, Y., Estrade, A., Nepal, N., Montes, F., Lorusso, G., Liang, J., Bae, S., Ha, J., Moon, B., and collaboration, the BRIKEN

Subjects
Physics - Instrumentation and Detectors
Abstract

A new detection system has been installed at the RIKEN Nishina Center (Japan) to investigate decay properties of very neutron-rich nuclei. The setup consists of three main parts: a moderated neutron counter, a detection system sensitive to the implantation and decay of radioactive ions, and gamma-ray detectors. We describe here the setup, the commissioning experiment and some selected results demonstrating its performance for the measurement of half-lives and beta-delayed neutron emission probabilities. The methodology followed in the analysis of the data is described in detail. Particular emphasis is placed on the correction of the accidental neutron background.

Published
2018
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2. AGATA - Advanced Gamma Tracking Array

Author

Akkoyun, S., Algora, A., Alikhani, B., Ameil, F., de Angelis, G., Arnold, L., Astier, A., Ataç, A., Aubert, Y., Aufranc, C., Austin, A., Aydin, S., Azaiez, F., Badoer, S., Balabanski, D. L., Barrientos, D., Baulieu, G., Baumann, R., Bazzacco, D., Beck, F. A., Beck, T., Bednarczyk, P., Bellato, M., Bentley, M. A., Benzoni, G., Berthier, R., Berti, L., Beunard, R., Bianco, G. Lo, Birkenbach, B., Bizzeti, P. G., Bizzeti-Sona, A. M., Blanc, F. Le, Blasco, J. M., Blasi, N., Bloor, D., Boiano, C., Borsato, M., Bortolato, D., Boston, A. J., Boston, H. C., Bourgault, P., Boutachkov, P., Bouty, A., Bracco, A., Brambilla, S., Brawn, I. P., Brondi, A., Broussard, S., Bruyneel, B., Bucurescu, D., Burrows, I., Bürger, A., Cabaret, S., Cahan, B., Calore, E., Camera, F., Capsoni, A., Carrió, F., Casati, G., Castoldi, M., Cederwall, B., Cercus, J. -L., Chambert, V., Chambit, M. El, Chapman, R., Charles, L., Chavas, J., Clément, E., Cocconi, P., Coelli, S., Coleman-Smith, P. J., Colombo, A., Colosimo, S., Commeaux, C., Conventi, D., Cooper, R. J., Corsi, A., Cortesi, A., Costa, L., Crespi, F. C. L., Cresswell, J. R., Cullen, D. M., Curien, D., Czermak, A., Delbourg, D., Depalo, R., Descombes, T., Désesquelles, P., Detistov, P., Diarra, C., Didierjean, F., Dimmock, M. R., Doan, Q. T., Domingo-Pardo, C., Doncel, M., Dorangeville, F., Dosme, N., Drouen, Y., Duchêne, G., Dulny, B., Eberth, J., Edelbruck, P., Egea, J., Engert, T., Erduran, M. N., Ertürk, S., Fanin, C., Fantinel, S., Farnea, E., Faul, T., Filliger, M., Filmer, F., Finck, Ch., de France, G., Gadea, A., Gast, W., Geraci, A., Gerl, J., Gernhäuser, R., Giannatiempo, A., Giaz, A., Gibelin, L., Givechev, A., Goel, N., González, V., Gottardo, A., Grave, X., Grȩbosz, J., Griffiths, R., Grint, A. N., Gros, P., Guevara, L., Gulmini, M., Görgen, A., Ha, H. T. M., Habermann, T., Harkness, L. J., Harroch, H., Hauschild, K., He, C., Hernández-Prieto, A., Hervieu, B., Hess, H., Hüyük, T., Ince, E., Isocrate, R., Jaworski, G., Johnson, A., Jolie, J., Jones, P., Jonson, B., Joshi, P., Judson, D. S., Jungclaus, A., Kaci, M., Karkour, N., Karolak, M., Kaşkaş, A., Kebbiri, M., Kempley, R. S., Khaplanov, A., Klupp, S., Kogimtzis, M., Kojouharov, I., Korichi, A., Korten, W., Kröll, Th., Krücken, R., Kurz, N., Ky, B. Y., Labiche, M., Lafay, X., Lavergne, L., Lazarus, I. H., Leboutelier, S., Lefebvre, F., Legay, E., Legeard, L., Lelli, F., Lenzi, S. M., Leoni, S., Lermitage, A., Lersch, D., Leske, J., Letts, S. C., Lhenoret, S., Lieder, R. M., Linget, D., Ljungvall, J., Lopez-Martens, A., Lotodé, A., Lunardi, S., Maj, A., van der Marel, J., Mariette, Y., Marginean, N., Marginean, R., Maron, G., Mather, A. R., Mȩczyński, W., Mendéz, V., Medina, P., Melon, B., Menegazzo, R., Mengoni, D., Merchan, E., Mihailescu, L., Michelagnoli, C., Mierzejewski, J., Milechina, L., Million, B., Mitev, K., Molini, P., Montanari, D., Moon, S., Morbiducci, F., Moro, R., Morrall, P. S., Möller, O., Nannini, A., Napoli, D. R., Nelson, L., Nespolo, M., Ngo, V. L., Nicoletto, M., Nicolini, R., Noa, Y. Le, Nolan, P. J., Norman, M., Nyberg, J., Obertelli, A., Olariu, A., Orlandi, R., Oxley, D. C., Özben, C., Ozille, M., Oziol, C., Pachoud, E., Palacz, M., Palin, J., Pancin, J., Parisel, C., Pariset, P., Pascovici, G., Peghin, R., Pellegri, L., Perego, A., Perrier, S., Petcu, M., Petkov, P., Petrache, C., Pierre, E., Pietralla, N., Pietri, S., Pignanelli, M., Piqueras, I., Podolyak, Z., Pouhalec, P. Le, Pouthas, J., Pugnére, D., Pucknell, V. F. E., Pullia, A., Quintana, B., Raine, R., Rainovski, G., Ramina, L., Rampazzo, G., La Rana, G., Rebeschini, M., Recchia, F., Redon, N., Reese, M., Reiter, P., Regan, P. H., Riboldi, S., Richer, M., Rigato, M., Rigby, S., Ripamonti, G., Robinson, A. P., Robin, J., Roccaz, J., Ropert, J. -A., Rossé, B., Alvarez, C. Rossi, Rosso, D., Rubio, B., Rudolph, D., Saillant, F., Şahin, E., Salomon, F., Salsac, M. -D., Salt, J., Salvato, G., Sampson, J., Sanchis, E., Santos, C., Schaffner, H., Schlarb, M., Scraggs, D. P., Seddon, D., Şenyiğit, M., Sigward, M. -H., Simpson, G., Simpson, J., Slee, M., Smith, J. F., Sona, P., Sowicki, B., Spolaore, P., Stahl, C., Stanios, T., Stefanova, E., Stézowski, O., Strachan, J., Suliman, G., Söderström, P. -A., Tain, J. L., Tanguy, S., Tashenov, S., Theisen, Ch., Thornhill, J., Tomasi, F., Toniolo, N., Touzery, R., Travers, B., Triossi, A., Tripon, M., Tun-Lanoë, K. M. M., Turcato, M., Unsworth, C., Ur, C. A., Valiente-Dobon, J. J., Vandone, V., Vardaci, E., Venturelli, R., Veronese, F., Veyssiere, Ch., Viscione, E., Wadsworth, R., Walker, P. M., Warr, N., Weber, C., Weisshaar, D., Wells, D., Wieland, O., Wiens, A., Wittwer, G., Wollersheim, H. J., Zocca, F., Zamfir, N. V., Ziȩbliński, M., and Zucchiatti, A.

Subjects
Physics - Instrumentation and Detectors, Nuclear Experiment
Abstract

The Advanced GAmma Tracking Array (AGATA) is a European project to develop and operate the next generation gamma-ray spectrometer. AGATA is based on the technique of gamma-ray energy tracking in electrically segmented high-purity germanium crystals. This technique requires the accurate determination of the energy, time and position of every interaction as a gamma ray deposits its energy within the detector volume. Reconstruction of the full interaction path results in a detector with very high efficiency and excellent spectral response. The realization of gamma-ray tracking and AGATA is a result of many technical advances. These include the development of encapsulated highly-segmented germanium detectors assembled in a triple cluster detector cryostat, an electronics system with fast digital sampling and a data acquisition system to process the data at a high rate. The full characterization of the crystals was measured and compared with detector-response simulations. This enabled pulse-shape analysis algorithms, to extract energy, time and position, to be employed. In addition, tracking algorithms for event reconstruction were developed. The first phase of AGATA is now complete and operational in its first physics campaign. In the future AGATA will be moved between laboratories in Europe and operated in a series of campaigns to take advantage of the different beams and facilities available to maximize its science output. The paper reviews all the achievements made in the AGATA project including all the necessary infrastructure to operate and support the spectrometer., Comment: This version contains a correction of a typing error in the caption of Fig. 2. The DOI to the article published in Nucl. Instr. Meth A was also added

Published
2011
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3. Migration of nuclear shell gaps studied in the d(24Ne,p gamma)25Ne reaction

Author

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

Subjects
Nuclear Experiment, Nuclear Theory
Abstract

The transfer of neutrons onto 24Ne has been measured using a reaccelerated radioactive beam of 24Ne to study the (d,p) reaction in inverse kinematics. The unusual raising of the first 3/2+ level in 25Ne and its significance in terms of the migration of the neutron magic number from N=20 to N=16 is put on a firm footing by confirmation of this state's identity. The raised 3/2+ level is observed simultaneously with the intruder negative parity 7/2- and 3/2- levels, providing evidence for the reduction in the N=20 gap. The coincident gamma-ray decays allowed the assignment of spins as well as the transferred orbital angular momentum. The excitation energy of the 3/2+ state shows that the established USD shell model breaks down well within the sd model space and requires a revised treatment of the proton-neutron monopole interaction., Comment: Phys. Rev. Lett. in press (4 pages, 3 figures)

Published
2010
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4. TIARA: a large solid angle silicon array for direct reaction studies with radioactive beams

Author

Labiche, M., Catford, W. N., Lemmon, R. C., Timis, C. N., Chapman, R., Orr, N. A., Fernandez-Dominguez, B., Moores, G., Achouri, N. L., Amzal, N., Appleton, S., Ashwood, N. I., Baldwin, T. D., Burns, M., Caballero, L., Cacitti, J., Casadjian, J. M., Chartier, M., Curtis, N., Faiz, K., de France, G., Freer, M., Gautier, J. M., Gelletly, W., Iltis, G., Lecornu, B., Liang, X., Marry, C., Merrer, Y., Olivier, L., Pain, S. D., Pucknell, V. F. E., Raine, B., Rejmund, M., Rubio, B., Saillant, F., Savajols, H., Sorlin, O., Spohr, K., Theisen, Ch., Voltolini, G., and Warner, D. D.

Subjects
Nuclear Experiment
Abstract

A compact, quasi-4pi position sensitive silicon array, TIARA, designed to study direct reactions induced by radioactive beams in inverse kinematics is described here. The Transfer and Inelastic All-angle Reaction Array (TIARA) consists of 8 resistive charge division detectors forming an octagonal barrel around the target and a set of double-sided silicon-strip annular detectors positioned at each end of the barrel. The detector was coupled to the -ray array EXOGAM and the spectrometer VAMOS at the GANIL Laboratory to demonstrate the potential of such an apparatus with radioactive beams. The 14N(d,p)15N reaction, well known in direct kinematics, has been carried out in inverse kinematics for that purpose. The observation of the 15N ground state and excited states at 7.16 and 7.86 MeV is presented here as well as the comparison of the measured proton angular distributions with DWBA calculations. Transferred l-values are in very good agreement with both theoretical calculations and previous experimental results obtained in direct kinematics., Comment: 12 figures, submitted to NIM A

Published
2009
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5. The SAGE spectrometer

Author

Pakarinen, J., Papadakis, P., Sorri, J., Herzberg, R. -D., Greenlees, P. T., Butler, P. A., Coleman-Smith, P. J., Cox, D. M., Cresswell, J. R., Jones, P., Julin, R., Konki, J., Lazarus, I. H., Letts, S. C., Mistry, A., Page, R. D., Parr, E., Pucknell, V. F. E., Rahkila, P., Sampson, J., Sandzelius, M., Seddon, D. A., Simpson, J., Thornhill, J., and Wells, D.

Published
2014
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6. Commissioning of the BRIKEN beta-delayed neutron detector for the study of exotic neutron-rich nuclei

Author

Tolosa-Delgado A., Agramunt J., Ahn D. S., Algora A., Baba H., Bae S., Brewer N. T., Caballero Folch R., Calvino F., Coleman-Smith P. J., Cortes G., Davinson T., Dillmann I., Domingo-Pardo C., Estrade A., Fukuda N., Go S., Griffin C. J., Grzywacz R., Ha J., Hall O., Harkness-Brennan L., Isobe T., Kahl D., Kiss G. G., Kogimtzis M., Kubono S., Labiche M., Lazarus I., Lee J., Liu J., Lorusso G., Matsui K., Miernik K., Montes F., Moon B., Morales A.I., Nepal N., Nishimura S., Page R. D., Phong V. H., Podolyak Z., Pucknell V. F. E., Rasco B. C., Regan P., Riego A., Rubio B., Rykaczewski K.P., Saito Y., Sakurai H., Shimizu Y., Simpson J., Söderström P.-A., Stracener D. W., Sumikama T., Suzuki H., Tain J. L., Takechi M., Takeda H., Tarifeño-Saldivia A., Thomas S. L., and Woods P.

Subjects
Physics, QC1-999
Abstract

The commissioning of a new setup for β-delayed neutron measurements was carried out successfully in November-2016, at the RIKEN Nishina Center in Japan. The β-decay half-lives and Pn branching ratios of several isotopes in the 78Ni region were measured. Details of the experimental setup and the first results are given.

Published
2017
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7. Studies of Single-Particle Structure in the N=16 Region Using Transfer Reactions

Author

Lemmon, R. C., Beatriz Fernandez Dominguez, Timis, C., Labiche, M., Catford, W. N., Chartier, M., Ashwood, N., Amzal, N., Baldwin, T. D., Burns, M., Caballero, L., Chapman, R., Curtis, N., France, G., Freer, M., Gelletly, W., Liang, X., Orr, N. A., Pain, S. D., Pucknell, V. P. E., Rejmund, M., Rubi, B., Savajols, H., Sarlin, O., Spohr, K., Thiesen, C., Warner, D. D., Instituto de Fisica Corpuscular (IFIC), Consejo Superior de Investigaciones Científicas [Madrid] (CSIC)-Universitat de València (UV), 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)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), 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), Département d'Astrophysique, de physique des Particules, de physique Nucléaire et de l'Instrumentation Associée (DAPNIA), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), L.Corradi, D. Ackermann, E. Fioretto, A. Gadea, F. Haas, G. Pollarolo, F. Scarlassara, Suzana Szilner, M. Trotta, EXOGAM, SPIRAL, VAMOS, Normandie Université (NU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and 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)

Subjects
Physics, Nuclear reaction, nuclei with mass number 20 to 38, Spectrometer, Cyclotron, Hadron, 020206 networking & telecommunications, Elementary particle, 02 engineering and technology, Fermion, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], law.invention, Nuclear physics, law, nuclear structure, 0202 electrical engineering, electronic engineering, information engineering, Measuring instrument, deuteron-nucleus reactions, 21.10.Pc, 25.45.Hi, 27.30.+t, 020201 artificial intelligence & image processing, neon, Nuclear Experiment, Nucleon
Abstract

International audience; We have developed a new experimental setup based at the GANIL/SPIRAL facility in Caen, France to measure one-nucleon transfer reactions in inverse kinematics in order to study the evolution of the single particle structure of exotic nuclei. The setup couples together three state-of-the-art detection systems: the TIARA Si array, the large-acceptance magnetic spectrometer VAMOS and the high-efficiency segmented Ge gamma-ray array EXOGAM. In a first experiment, the $^{24}$Ne(d,p)$^{25}$Ne reaction has been studied to probe the N=16 shell closure. Details of the setup, data analysis and preliminary results are presented.

Published
2006

8. Migration of Nuclear Shell Gaps Studied in thed(Ne24,pγ)Ne25Reaction

Author

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

Published
2010
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9. Study of transfer reactions in inverse kinematics with the TIARA array

Author

Labiche, M, primary, Timis, C N, additional, Lemmon, R C, additional, Catford, W N, additional, Chapman, R, additional, Amzal, N, additional, Ashwood, N I, additional, Baldwin, T D, additional, Burns, M, additional, Caballero, L, additional, Chartier, M, additional, Curtis, N, additional, France, G de, additional, Gelletly, W, additional, Liang, X, additional, Freer, M, additional, Orr, N A, additional, Pain, S D, additional, Pucknell, V P E, additional, Rejmund, M, additional, Rubio, B, additional, Savajols, H, additional, Sorlin, O, additional, Spohr, K, additional, Thiesen, Ch, additional, and Warner, D D, additional

Published
2005
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10. Nucleon transfer via (d,p) using TIARA with a24Ne radioactive beam

Author

Catford, W N, primary, Timis, C N, additional, Lemmon, R C, additional, Labiche, M, additional, Orr, N A, additional, Caballero, L, additional, Chapman, R, additional, Freer, M, additional, Chartier, M, additional, Savajols, H, additional, Rejmund, M, additional, Amzal, N, additional, Ashwood, N I, additional, Baldwin, T D, additional, Burns, M, additional, Curtis, N, additional, France, G de, additional, Gelletly, W, additional, Liang, X, additional, Pain, S D, additional, Pucknell, V P E, additional, Rubio, B, additional, Sorlin, O, additional, Spohr, K, additional, Thiesen, Ch, additional, and Warner, D D, additional

Published
2005
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11. Studies of the Single Particle Structure of Exotic Nuclei using Transfer Reactions.

Author

Fernández-Domínguez, B., Lemmon, R. C., Timis, C., Labiche, M., Catford, W. N., Chartier, M., Ashwood, N., Amzal, N., Baldwin, T. D., Burns, M., Caballero, L., Chapman, R., Curtis, N., de France, G., Freer, M., Gelletly, W., Liang, X., Orr, N. A., Pain, S. D., and Pucknell, V. P. E.

Subjects
NUCLEAR physics, NUCLEAR energy, NUCLEAR reactions, PHYSICS, PARTICLES (Nuclear physics)
Abstract

The TIARA+VAMOS+EXOGAM set-up has recently been installed at GANIL to study the single-particle structure of exotic nuclei. The unique characteristics of the TIARA array, combined with the large acceptance spectrometer VAMOS and the high efficiency Germanium detector array EXOGAM, has allowed high-resolution measurements of transfer reactions in inverse kinematics using low intensity exotic beams. We will describe the experimental set-up, data analysis and preliminary results of the first experiments using a 24Ne beam from SPIRAL, concentrating in particular on the performance of VAMOS that has been used to detect the heavy fragments after the (d,p), (d,d) and (d,t) reactions. © 2006 American Institute of Physics [ABSTRACT FROM AUTHOR]

Published
2006
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12. Nucleon transfer via (d,p) using TIARA with a 24Ne radioactive beam

Author

Catford, W WNC, Timis, C CNT, Lemmon, R RCL, Labiche, M ML, Orr, N NAO, Caballero, L LC, Chapman, R RC, Freer, M MF, Chartier, M MC, Savajols, H HS, Rejmund, M MR, Amzal, N NA, Ashwood, N NIA, Baldwin, T TDB, Burns, M MB, Curtis, N NC, France, G GdF, Gelletly, W WG, Liang, X XL, Pain, S SDP, Pucknell, V VPE E, Rubio, B BR, Sorlin, O OS, Spohr, K KS, Thiesen, Ch CT, and Warner, D DDW

Abstract

The first physics results measured using the TIARA array are reported. The reaction 24Ne(d,p)25Ne has been studied in inverse kinematics with a radioactive beam of 24Ne provided by SPIRAL at GANIL. TIARA is very compact with a high geometrical coverage for charged particles, and is designed specifically for the study of transfer reactions in inverse kinematics, with radioactive beams. From the (d,p) differential cross sections, the ground state of 25Ne is assigned to have Jπ = 1/2+ and the lowest states with Jπ = 5/2+ and 3/2+ are tentatively identified at excitation energies of 1.70 and 2.05 (±0.05) MeV, respectively. Coincident gamma-ray data proved essential to resolve these two excited states. Strongly populated levels observed at 3.30 and 4.05 (±0.05) MeV are candidates for negative parity states. Further analysis of the differential cross sections is in progress, with the aim of improving the identification of the higher lying states and determining absolute spectroscopic factors.

Published
2005

13. The structure of 16O; A review of the theory

Author

Irvine, J. M., Latorre, C. D., and Pucknell, V. F. E.

Abstract

The nucleus 168O8 is the prototype for a large number of developments in nuclear structure theory. It is a doubly magic N=Z nucleus, light enough that an isotopic spin formalism should be a valid approximation. The Brueckner-Hartree-Fock procedure in a spherical basis should be capable of describing the gross properties of the ground state. The excited states of negative parity exhibit the characteristic low-lying ‘octupole vibrational state’ and there is a much studied ‘giant dipole region’ which should be amenable to the analysis of the ‘random phase approximation’. The first excited state is the ‘mysterious second zero’ par excellence and a great deal of work on describing it via the method of ‘deformed state admixtures’ has been carried out. The first excited state and a number of other excited states appear to support spectra reminiscent of rotational bands and the collective character of these states has been extensively studied in both the Bloch-Horowitz and -cluster model schemes.

Published
1971
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