36 results on '"Kondev, Filip G"'
Search Results
2. Comment on 'Atomic mass compilation 2012' by B. Pfeiffer, K. Venkataramaniah, U. Czok, C. Scheidenberger
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Audi, Georges, Blaum, Klaus, Block, Michael, Bollen, Georg, Herfurth, Frank, Goriely, Stéphane, Hardy, John C, Kondev, Filip G, Kluge, Juergen H, Lunney, David, Pearson, Mike J, Savard, Guy, Sharma, Kumar, Wang, Meng, and Zhang, Yuhu
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Nuclear Experiment ,Nuclear Theory - Abstract
This "Comment" submitted to ADNDT on December 13, 2013 concerns a publication entitled "Atomic Mass Compilation 2012", which appeared in the March 2014 issue of the journal Atomic Data and Nuclear Data Tables (available online on September 6, 2013)., Comment: 4 pages
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- 2014
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3. Thermal Equilibration of 176-Lu via K-Mixing
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Gintautas, Vadas, Champagne, Arthur E., Kondev, Filip G., and Longland, Richard
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Nuclear Theory - Abstract
In astrophysical environments, the long-lived (\T_1/2 = 37.6 Gy) ground state of 176-Lu can communicate with a short-lived (T_1/2 = 3.664 h) isomeric level through thermal excitations. Thus, the lifetime of 176-Lu in an astrophysical environment can be quite different than in the laboratory. We examine the possibility that the rate of equilibration can be enhanced via K-mixing of two levels near E_x = 725 keV and estimate the relevant gamma-decay rates. We use this result to illustrate the effect of K-mixing on the effective stellar half-life. We also present a network calculation that includes the equilibrating transitions allowed by K-mixing. Even a small amount of K-mixing will ensure that 176-Lu reaches at least a quasi-equilibrium during an s-process triggered by the 22-Ne neutron source., Comment: 9 pages, 6 figures
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- 2008
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4. White paper on nuclear astrophysics and low-energy nuclear physics, Part 2: Low-energy nuclear physics
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Carlson, Joe, Carpenter, Michael P., Casten, Richard, Elster, Charlotte, Fallon, Paul, Gade, Alexandra, Gross, Carl, Hagen, Gaute, Hayes, Anna C., Higinbotham, Douglas W., Howell, Calvin R., Horowitz, Charles J., Jones, Kate L., Kondev, Filip G., Lapi, Suzanne, Macchiavelli, Augusto, McCutchen, Elizabeth A., Natowitz, Joe, Nazarewicz, Witold, Papenbrock, Thomas, Reddy, Sanjay, Riley, Mark A., Savage, Martin J., Savard, Guy, Sherrill, Bradley M., Sobotka, Lee G., Stoyer, Mark A., Betty Tsang, M., Vetter, Kai, Wiedenhoever, Ingo, Wuosmaa, Alan H., and Yennello, Sherry
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- 2017
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5. IAEA coordinated research project on nuclear data for charged-particle monitor reactions and medical isotope production
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Capote Roberto, Nichols Alan L., Nortier Francois Meiring, Carlson Brett V., Engle Jonathan W., Hermanne Alex, Hussain Mazhar, Ignatyuk Anatoly V., Kellett Mark A., Kibédi Tibor, Kim Guinyun, Kondev Filip G., Lebeda Ondrej, Luca Aurelian, Naik Haladhara, Nagai Yasuki, Spahn Ingo, Suryanarayana Saraswatula V., Tárkányi Ferenc T., and Verpelli Marco
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Physics ,QC1-999 - Abstract
An IAEA coordinated research project was launched in December 2012 to establish and improve the nuclear data required to characterise charged-particle monitor reactions and extend data for medical radionuclide production. An international team was assembled to undertake work addressing the requirements for more accurate cross-section data over a wide range of targets and projectiles, undertaken in conjunction with a limited number of measurements and more extensive evaluations of the decay data of specific radionuclides. These studies are nearing completion, and are briefly described below.
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- 2017
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6. Changes of deformed shell gaps at N ∼ 100 in light rare-earth, neutron-rich nuclei
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Liu, Y X, primary, Lv, C J, additional, Sun, Y, additional, and Kondev, Filip G, additional
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- 2020
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7. Evolution of collective and noncollective structures in Xe-123
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Basu, Anwesha, Singh, Amit Kumar, Nag, Somnath, Hagemann, Gudrun B, Sletten, Geirr, Herskind, Bent, Wilson, Anna N, Rogers, John, Ragnarsson, Ingemar, Hubel, Herbert, Chmel, Sebastian, Janssens, Robert V F, Carpenter, Michael P, Khoo, Teng Lek, and Kondev, Filip G
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Nuclear Theory ,Nuclear Experiment - Abstract
An experiment involving a heavy-ion-induced fusion-evaporation reaction was carried out where high-spin states of 123Xe were populated in the 80Se (48Ca,5n) 123Xe reaction at 207 MeV beam energy. Gamma-ray coincidence events were recorded with the Gammasphere Ge detector array. The previously known level scheme was confirmed and enhanced with the addition of five new band structures and several interband transitions. Cranked Nilsson-Strutinsky (CNS) calculations were performed and compared with the experimental results in order to assign configurations to the bands.
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- 2020
8. Nucleus++: a new tool bridging Ameand Nubasefor advancing nuclear data analysis
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Shi, Jin-Yang, Huang, Wen-Jia, Wang, Meng, Yan, Xin-Liang, Lunney, David, Audi, Georges, Kondev, Filip G., Naimi, Sarah, and Chakma, Rikel
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The newly developed software, Nucleus++, is an advanced tool for displaying basic nuclear physics properties from Nubaseand integrating comprehensive mass information for each nuclide from Atomic Mass Evaluation. Additionally, it allows users to compare experimental nuclear masses with predictions from different mass models. Building on the success and learning experiences of its predecessor, Nucleus, this enhanced tool introduces improved functionality and compatibility. With its user-friendly interface, Nucleus++was designed as a valuable tool for scholars and practitioners in the field of nuclear science. This article offers an in-depth description of Nucleus++, highlighting its main features and anticipated impacts on nuclear science research.
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- 2024
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9. Recommended Nuclear Data for the Production of Selected Therapeutic Radionuclides
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Engle, Jonathan W, Ignatyuk, Anatoly V, Capote, Roberto, Carlson, B.V., Hermanne, Alex, Kellett, Mark A, Kibedi, Tibor, Kim, Guinyun, Kondev, Filip G, Hussain, Mazhar, Lebeda, Ondřej, Engle, Jonathan W, Ignatyuk, Anatoly V, Capote, Roberto, Carlson, B.V., Hermanne, Alex, Kellett, Mark A, Kibedi, Tibor, Kim, Guinyun, Kondev, Filip G, Hussain, Mazhar, and Lebeda, Ondřej
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Increasing interest in the treatment of human disease by means of targeted radionuclide-based therapies requires an accurate understanding of achievable yields and quantification of realisable degrees of purity. Important studies within a more extensive Coordinated Research Project of the International Atomic Energy Agency (IAEA CRP) have included in-depth assessments and evaluations of all available measured cross-section data for ten nuclear reactions leading to the formation of 131Cs, 131Ba, 225Ac, 225Ra, 227Th, 227Ac, 230U and 230Pa for various on-going and proposed therapeutic applications in nuclear medicine. Equivalent studies were also undertaken of possible reactions to produce the 178W/low-spin 178mTa generator system that has been clinically applied in diagnosis by means of SPECT - these particular cross-section studies and recommendations are included in this paper for completeness. All available measured data have been critically reviewed and assessed to produce statistically consistent datasets. Selected datasets have been fitted by a least-squares method with Padé approximations of variable order to evaluate the production cross sections and corresponding uncertainties. New measurements have been made in some instances, and reported data have been adjusted to accommodate new nuclear decay or monitor reaction data which altered the original reported quantities adversely. Insufficient measured data are available in many cases to permit a reliable evaluation of cross sections, and these instances are discussed. Recommended therapeutic radionuclide production reaction data and their uncertainties are available on the Web page of the IAEA Nuclear Data Section at www-nds.iaea.org/radionuclides/ and also at the IAEA medical portal www-nds.iaea.org/medportal/.
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- 2019
10. Erratum to 'Configurations and Hindered decays of K isomers in deformed nuclei with A>100 ' [At. Data Nucl. Data Tables 103-104 (2015) 50-105]
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Kondev, Filip G, Dracoulis, George, Kibedi, Tibor, Kondev, Filip G, Dracoulis, George, and Kibedi, Tibor
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- 2015
11. The 2012 Atomic Mass Evaluation and Future
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Wang, Meng, primary, Audi, Georges, additional, Kondev, Filip G., additional, Maccormick, Marion, additional, and Xu, Xing, additional
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- 2015
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12. Thermal equilibration of Lu 176 via K mixing
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Kondev, Filip G., Gintautas, Vadas, Champagne, Arthur E., and Longland, Richard
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- 2009
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13. Deep inelastic reactions and isomers in neutron-rich nuclei across the perimeter of the A = 180-190 deformed region
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Dracoulis, George, Lane, Gregory, Byrne, Aidan, Watanabe, Hiroshi, Hughes, Richard, Kondev, Filip G, Carpenter, M P, Janssens, R V F, Lauritsen, T, Lister, C J, Seweryniak, D, Zhu, S., Chowdhury, P, Shi, Yue, Xu, F R, Dracoulis, George, Lane, Gregory, Byrne, Aidan, Watanabe, Hiroshi, Hughes, Richard, Kondev, Filip G, Carpenter, M P, Janssens, R V F, Lauritsen, T, Lister, C J, Seweryniak, D, Zhu, S., Chowdhury, P, Shi, Yue, and Xu, F R
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Recent results on high-spin isomers populated in deep-inelastic reactions in the transitional tungsten-osmium region are outlined with a focus on 190Os, 192Os and 194Os. As well as the characterization of several two-quasinutron isomers, the 12+ and 20+ isomers in 192Os are interpreted as manifestations of maximal rotation alignment within the neutron i13/2 and possibly proton h11/2 shells at oblate deformation.
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- 2014
14. A Model to Realize the Potential of Auger Electrons for Radiotherapy
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Lee, Boon, Kibedi, Tibor, Stuchbery, Andrew, Robertson, Kalman, Kondev, Filip G, Lee, Boon, Kibedi, Tibor, Stuchbery, Andrew, Robertson, Kalman, and Kondev, Filip G
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Auger-electron-emitting radioisotopes provide a unique tool that enables the targeted irradiation of a small volume in their immediate vicinity. Over the last forty years, Auger emission has been established as a promising form of molecular radiotherapy
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- 2013
15. Multiquasiparticle states in the neutron-rich nucleus 174 Tm
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Hughes, Richard, Lane, Gregory, Dracoulis, George, Byrne, Aidan, Nieminen, Paivi, Watanabe, H, Carpenter, M P, Chowdhury, P, Janssens, R V F, Kondev, Filip G, Lauritsen, T, Seweryniak, D, Zhu, S., Hughes, Richard, Lane, Gregory, Dracoulis, George, Byrne, Aidan, Nieminen, Paivi, Watanabe, H, Carpenter, M P, Chowdhury, P, Janssens, R V F, Kondev, Filip G, Lauritsen, T, Seweryniak, D, and Zhu, S.
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Deep inelastic and transfer reactions with an 820-MeV, 136Xe beam and various ytterbium and lutetium targets have been employed to study high-spin structures in the neutron-rich thulium isotopes beyond 171Tm. Results in the doubly odd nucleus, 174Tm, incl
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- 2013
16. Nuclear Data Sheets for A = 84
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Abriola, Daniel, Bostan, Melih, Erturk, Sefa, Fadil, Manssour, Galan, Monica, Juutinen, S, Kibedi, Tibor, Kondev, Filip G, Luca, Aurelian, Negret, Alexandru, Nica, Ninel, Pfeiffer, Bernd, Singh, Balraj, Sonzogni, Alejandro, Timar, Janos, Tuli, Jagdish, Venkova, Tsanka, Zuber, Kazimierz, Abriola, Daniel, Bostan, Melih, Erturk, Sefa, Fadil, Manssour, Galan, Monica, Juutinen, S, Kibedi, Tibor, Kondev, Filip G, Luca, Aurelian, Negret, Alexandru, Nica, Ninel, Pfeiffer, Bernd, Singh, Balraj, Sonzogni, Alejandro, Timar, Janos, Tuli, Jagdish, Venkova, Tsanka, and Zuber, Kazimierz
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The evaluated spectroscopic data are presented for 12 known nuclides of mass 84 (Ga, Ge, As, Se, Br, Kr, Rb, Sr, Y, Zr, Nb, Mo). Except for the stable nuclides84Sr and84Kr, extensive new data are available for all the other nuclides since the 1997 evaluation by J.K. Tuli (1997Tu02) of A = 84 nuclides. Many precise Penning-trap mass measurements since AME-2003 for A = 84 nuclides (2009Re03,2008Ha23,2008We10,2007Ke09,2006Ka48,2006De36,2006Ri15) have resulted in improved Q values and separation energies. However, many deficiencies still remain. Some examples are given below. Excited-state data for84Ga and84As are nonexistent, and those for84Ge are scarce. The radioactive decay schemes of84Ga,84Ge,84Se,84Y (39.5 min),84Y (4.6 s),84Zr and84Nb suffer from incompleteness and that for84Mo decay is not known at all. The energy ordering of the two activities (39.5 min and and 4.6 s) of84Y is not well established, although, high-spin with tentative spin-parity of (6+) is adopted here as the ground state of84Y based on weak arguments. From a conference report published in 2000, it is clear that extensive experiments were done to investigate decays of84Zr and84Y, but details of these studies never appeared in literature and none were made available to the evaluators when requested from original authors. This evaluation was carried out as part of ENSDF workshop for Nuclear Structure and Decay Data Evaluators, organized and hosted by the "Horia Hulubei" National Institute for Physics and Nuclear Engineering, Bucharest, Romania during March 30, 2009 - April 3, 2009. Names of the evaluators principally responsible for evaluation of individual nuclides are given under the respective Adopted data sets.
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- 2009
17. K-hindered transitions and multi-quasiparticle structure in 185 Re
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Lee, Boon, Lane, Gregory, Dracoulis, George, Kondev, Filip G, Byrne, Aidan, Nieminen, Paivi, Watanabe, H, Carpenter, M P, Janssens, R V F, Lauritsen, T, Seweryniak, D, Zhu, S., Chowdhury, P, Lee, Boon, Lane, Gregory, Dracoulis, George, Kondev, Filip G, Byrne, Aidan, Nieminen, Paivi, Watanabe, H, Carpenter, M P, Janssens, R V F, Lauritsen, T, Seweryniak, D, Zhu, S., and Chowdhury, P
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- 2008
18. Studies of multi-quasiparticle K-isomers in rare-earth and trans-fermium nuclei
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Kondev, Filip G, Dracoulis, George, Khoo, T, Lane, Gregory, Byrne, Aidan, Kibedi, Tibor, Ahmad, I., Back, B., Carpenter, M P, Janssens, R V F, Lauritsen, T, Lister, C J, Peterson, D., Seweryniak, D, Zhu, S., Chowdhury, P, Tandel, S K, Kondev, Filip G, Dracoulis, George, Khoo, T, Lane, Gregory, Byrne, Aidan, Kibedi, Tibor, Ahmad, I., Back, B., Carpenter, M P, Janssens, R V F, Lauritsen, T, Lister, C J, Peterson, D., Seweryniak, D, Zhu, S., Chowdhury, P, and Tandel, S K
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- 2007
19. Single-Particle and Collective Degrees of Freedom in 101 Zr and 103,105 Mo
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Orlandi, R, Smith, A G, Patel, D, Simpson, G S, Wall, R M, Smith, J F, Onakanmi, O J, Ahmad, I., Greene, J.P., Carpenter, M P, Lauritsen, T, Lister, C J, Janssens, R V F, Kondev, Filip G, Seweryniak, D, Gall, B.J.P., Dorveaux, O., Stuchbery, Andrew, Orlandi, R, Smith, A G, Patel, D, Simpson, G S, Wall, R M, Smith, J F, Onakanmi, O J, Ahmad, I., Greene, J.P., Carpenter, M P, Lauritsen, T, Lister, C J, Janssens, R V F, Kondev, Filip G, Seweryniak, D, Gall, B.J.P., Dorveaux, O., and Stuchbery, Andrew
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The g factors of several low-lying excited states of the neutron-rich Zr101 and Mo103,105 nuclei have been measured for the first time. The isotopes were produced by the spontaneous fission of a Cf252 source, which was sandwiched between two magnetized iron foils and placed at the center of the Gammasphere spectrometer. The g factors of excited states of fission fragments were inferred from Larmor precessions deduced from the measurement of time-integrated perturbed angular correlation functions. The magnitude and sign of the quantity (gK-gR)/Q0 were determined from the mixing ratios measured for the 3/2[411] and 5/2[532] rotational bands in Zr101 and Mo103,105. The combination of this quantity with the measured g factors permitted the separation of the particle-rotor parameters gK and gR for each band. The comparison of the extracted gK factors to Nilsson model predictions confirms current band assignments, and this agreement is consistent with an axially symmetric picture of these nuclei at low spins. The possible effect of triaxial deformation on the measured magnetic moments was investigated in the rigid triaxial rotor-plus-particle framework. The calculations suggest that triaxial deformation plays a stronger role in the Mo than in the Zr isotopes, but that triaxiality is likely to be dynamic. The extracted gR factors are consistently smaller than the Z/A limit, in agreement with observations in neighboring even-even nuclei.
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- 2006
20. Strength of Octupole Correlations in the Actinides: Contrasting Behavior in the Isotones 237 U and 239 Pu
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Zhu, S., Janssens, R V F, Lane, Gregory, Wiedenhover, I, Carpenter, M P, Ahmad, I., Byrne, Aidan, Chowdhury, P, Cline, D., Deacon, A.N., Dracoulis, George, Freeman, S J, Hammond, N.J., Khoo, T, Kondev, Filip G, Lauritsen, T, Lister, C J, Macchiavelli, A O, Moore, E.F., Seweryniak, D, Smith, John Robert, Wu, C Y, Jones, G D, Zhu, S., Janssens, R V F, Lane, Gregory, Wiedenhover, I, Carpenter, M P, Ahmad, I., Byrne, Aidan, Chowdhury, P, Cline, D., Deacon, A.N., Dracoulis, George, Freeman, S J, Hammond, N.J., Khoo, T, Kondev, Filip G, Lauritsen, T, Lister, C J, Macchiavelli, A O, Moore, E.F., Seweryniak, D, Smith, John Robert, Wu, C Y, and Jones, G D
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A study of high spin states in the odd-neutron isotones 239Pu and 237U is reported. Striking differences were found in the high-spin properties of rotational bands built on the 1/2+[631] ground states in these two nuclei. These differences mirror those observed in the even-even Pu and U immediate neighbors and appear to be related to the strength of octupole correlations.
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- 2005
21. Beyond Band Termination in 157 Er and the Search for Wobbling Excitations in Strongly Deformed 174 Hf
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Riley, M.A., Djongolov, M.K., Evans, Aaron, Hartley, D J, Janssens, R V F, Paul, E, Simpson, Jane, Aguilar, A. A, Appelbe, D., Bingham, C.R., Campbell, D.B., Carpenter, M P, Chowdhury, P, Choy, P T W, Clark, Robert Graham, Cromaz, M., Cullen, D M, Danchev, M., Dracoulis, George, Fallon, P, Gorgen, A, Hagemann, G B, Joss, D., Goon, J., Kaye, R A, Khoo, T, Kondev, Filip G, Laird, R W, Lagergren, K, Lauritsen, T, Macchiavelli, A O, McClain, B, Moore, E.F., Mukherjee, G, Ngijoi-Yogo, E, Nolan, P, Park, Hyoungshin, Pipidis, A, Riedinger, L L, Sletten, G, Tandel, S K, Walker, Philip M, Ward, D, Ragnarsson, I, Saric, F, Zhang, Jing-ye, Riley, M.A., Djongolov, M.K., Evans, Aaron, Hartley, D J, Janssens, R V F, Paul, E, Simpson, Jane, Aguilar, A. A, Appelbe, D., Bingham, C.R., Campbell, D.B., Carpenter, M P, Chowdhury, P, Choy, P T W, Clark, Robert Graham, Cromaz, M., Cullen, D M, Danchev, M., Dracoulis, George, Fallon, P, Gorgen, A, Hagemann, G B, Joss, D., Goon, J., Kaye, R A, Khoo, T, Kondev, Filip G, Laird, R W, Lagergren, K, Lauritsen, T, Macchiavelli, A O, McClain, B, Moore, E.F., Mukherjee, G, Ngijoi-Yogo, E, Nolan, P, Park, Hyoungshin, Pipidis, A, Riedinger, L L, Sletten, G, Tandel, S K, Walker, Philip M, Ward, D, Ragnarsson, I, Saric, F, and Zhang, Jing-ye
- Abstract
High-spin terminating bands in heavy nuclei were first identified in nuclei around 158Er90. While examples of special terminating states have been identified in a number of erbium isotopes, almost nothing is known about the states lying beyond band termination. In the present work the high-spin structure of 157Er has been studied using the Gammasphere spectrometer. The subject of triaxial superdeformation and 'wobbling' modes in Lu nuclei has rightly attracted a great deal of attention. Very recently, four strongly or superdeformed (SD) sequences have been observed in 174Hf and ultimate cranker calculations predict such structures may have significant triaxial deformation. We have performed two experiments in an attempt to verify the possible triaxial nature of these bands. A lifetime measurement was performed to confirm the large (and similar) deformation of the bands. In addition, a high-statistics, thin-target experiment was run to search for linking transitions between the SD bands and possible wobbling modes.
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- 2005
22. Structure of Multi-Quasiparticle Isomers in the Region of 177 Lu
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Dracoulis, George, Kondev, Filip G, Lane, Gregory, Byrne, Aidan, Kibedi, Tibor, Ahmad, I., Carpenter, M P, Freeman, S J, Janssens, R V F, Hammond, N.J., Lauritsen, T, Lister, C J, Seweryniak, D, Mukherjee, G, Chowdhury, P, Tandel, S K, Dracoulis, George, Kondev, Filip G, Lane, Gregory, Byrne, Aidan, Kibedi, Tibor, Ahmad, I., Carpenter, M P, Freeman, S J, Janssens, R V F, Hammond, N.J., Lauritsen, T, Lister, C J, Seweryniak, D, Mukherjee, G, Chowdhury, P, and Tandel, S K
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- 2005
23. Wobbling Excitations in Strongly Deformed Hf Nuclei?
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Hartley, D J, Djongolov, M.K., Riedinger, L L, Hagemann, G B, Janssens, R V F, Kondev, Filip G, Moore, E.F., Riley, M.A., Aguilar, A.A., Bingham, C.R., Campbell, D.B., Carpenter, M P, Chowdhury, P, Cromaz, M., Cullen, D M, Danchev, M., Dracoulis, George, Fallon, P, Goon, J., Kaye, R A, Khoo, T, Laird, R W, Lauritsen, T, Macchiavelli, A O, McClain, B, Mukherjee, G, Ngijoi-Yogo, E, Park, Hyoungshin, Sletten, G, Tandel, S K, Walker, Philip M, Zhang, Jing-ye, Hartley, D J, Djongolov, M.K., Riedinger, L L, Hagemann, G B, Janssens, R V F, Kondev, Filip G, Moore, E.F., Riley, M.A., Aguilar, A.A., Bingham, C.R., Campbell, D.B., Carpenter, M P, Chowdhury, P, Cromaz, M., Cullen, D M, Danchev, M., Dracoulis, George, Fallon, P, Goon, J., Kaye, R A, Khoo, T, Laird, R W, Lauritsen, T, Macchiavelli, A O, McClain, B, Mukherjee, G, Ngijoi-Yogo, E, Park, Hyoungshin, Sletten, G, Tandel, S K, Walker, Philip M, and Zhang, Jing-ye
- Abstract
Two Gammasphere experiments have been performed in order to establish the possible triaxial nature of strongly deformed (SD) bands in174Hf. A lifetime measurement, using the Doppler-shift attenuation method, confirmed the large deformation of the four previously observed bands in this nucleus with transition quadrupole moments ranging from 12.6 to 13.8 b. These values are significantly larger than those predicted for triaxial minima by ultimate cranker (UC) calculations. A thin-target, high-statistics experiment was also carried out to search for linking transitions between the SD bands. No such transitions, which represent an experimental signature for wobbling modes, were observed. Four additional SD bands were found in174Hf together with a single SD band in173Hf. These results indicate that the strongly deformed sequences of N≈102 Hf isotopes behave differently than the triaxial strongly deformed (TSD) bands found in Lu nuclei near N=92. The interpretation of these bands in terms of possible stable triaxial deformation is confronted with the experimental findings and UC predictions.
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- 2005
24. Search for Wobbling Excitations in Hf Nuclei: Are the SD Bands Triaxial?
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Hartley, D J, Djongolov, M.K., Riedinger, L L, Hagemann, G B, Janssens, R V F, Kondev, Filip G, Moore, E.F., Aguilar, A.A., Bingham, C.R., Campbell, D.B., Carpenter, M P, Chowdhury, P, Cromaz, M., Cullen, D M, Danchev, M., Dracoulis, George, Fallon, P, Goon, J., Kaye, R A, Laird, R W, Khoo, T, Lauritsen, T, Macchiavelli, A O, McClain, B, Mukherjee, G, Ngijoi-Yogo, E, Sletten, G, Tandel, S K, Walker, Philip M, Zhang, Jing-ye, Riley, M.A., Park, H.I., Hartley, D J, Djongolov, M.K., Riedinger, L L, Hagemann, G B, Janssens, R V F, Kondev, Filip G, Moore, E.F., Aguilar, A.A., Bingham, C.R., Campbell, D.B., Carpenter, M P, Chowdhury, P, Cromaz, M., Cullen, D M, Danchev, M., Dracoulis, George, Fallon, P, Goon, J., Kaye, R A, Laird, R W, Khoo, T, Lauritsen, T, Macchiavelli, A O, McClain, B, Mukherjee, G, Ngijoi-Yogo, E, Sletten, G, Tandel, S K, Walker, Philip M, Zhang, Jing-ye, Riley, M.A., and Park, H.I.
- Abstract
Two Gammasphere experiments have been performed in order to establish the possible triaxial nature of strongly deformed (SD) bands in174Hf. A lifetime measurement confirmed the large deformation of the four previously observed bands in this nucleus. In addition, a thin-target, high-statistics experiment was carried out to search for linking transitions between the SD bands. No such transitions, which represent an experimental signature for wobbling modes, were observed. Four new SD bands were found in174Hf together with a single SD band in173Hf. These results indicate that the strongly deformed sequences of N ≈ 102 Hf isotopes behave differently than the TSD bands found in Lu nuclei near N = 92. The interpretation of these bands in terms of possible stable triaxial deformation is confronted with the experimental findings and UC predictions.
- Published
- 2005
25. Comparison of nuclear mass models at nuclearmasses.org
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Smith, Michael S., primary, Nesaraja, Caroline D., additional, Lingerfelt, Eric J., additional, Koura, Hiroyuki, additional, and Kondev, Filip G., additional
- Published
- 2012
- Full Text
- View/download PDF
26. Highly-Deformed Bands in 175 Hf
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Scholes, D T, Cullen, D M, Kondev, Filip G, Janssens, R V F, Carpenter, M P, Hartley, D J, Djongolov, M.K., Sletten, G, Hagemann, G B, Wheldon, C, Walker, Philip M, Abu Saleem, K, Ahmad, I., Balabanski, D, Chowdhury, P, Danchev, M., Dracoulis, George, El Masri, H, Goon, J., Heinz, A, Kaye, R A, Khoo, T, Lauritsen, T, Lister, C J, Moore, E.F., Riedinger, L L, Riley, M.A., Seweryniak, D, Shestakova, I, Wiedenhover, I, Zeidan, O, Zhang, Jing-ye, Scholes, D T, Cullen, D M, Kondev, Filip G, Janssens, R V F, Carpenter, M P, Hartley, D J, Djongolov, M.K., Sletten, G, Hagemann, G B, Wheldon, C, Walker, Philip M, Abu Saleem, K, Ahmad, I., Balabanski, D, Chowdhury, P, Danchev, M., Dracoulis, George, El Masri, H, Goon, J., Heinz, A, Kaye, R A, Khoo, T, Lauritsen, T, Lister, C J, Moore, E.F., Riedinger, L L, Riley, M.A., Seweryniak, D, Shestakova, I, Wiedenhover, I, Zeidan, O, and Zhang, Jing-ye
- Abstract
Two high-spin regularly spaced rotational bands with large dynamical moments of inertia have been identified in 175Hf with the Gammasphere spectrometer. These new bands are very similar to the previously identified triaxial superdeformed bands in the hafnium nuclei. However, the new bands in 175Hf have been linked into the known level scheme and thereby provide the first firm spin assignments for these structures in this region. In order to understand the new bands, theoretical calculations have been performed based on the ULTIMATE CRANKER code. The new bands in 175Hf are deduced to be built upon highly deformed structures. No experimental evidence for triaxiality was established and this work suggests that the structure of the so-called "triaxial" superdeformed bands in the Hf nuclei may be quite different from those identified in the lighter mass Lu nuclei. Since the two highly deformed bands in 175Hf are associated with different deformations, this work also identifies the role of the intruder orbits in polarizing the nuclear shape.
- Published
- 2004
27. Possible Triaxial Superdeformation in 174 Hf
- Author
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Hartley, D J, Djongolov, M.K., Riedinger, L L, Kondev, Filip G, Janssens, R V F, Abu Saleem, K, Ahmad, I., Balabanski, D, Carpenter, M P, Chowdhury, P, Cullen, D M, Danchev, M., Dracoulis, George, El Masri, H, Goon, J., Heinz, A, Kaye, R A, Khoo, T, Lauritsen, T, Lister, C J, Moore, E.F., Riley, M.A., Seweryniak, D, Shestakova, I, Sletten, G, Walker, Philip M, Wheldon, C, Wiedenhover, I, Zeidan, O, Zhang, Jing-ye, Hartley, D J, Djongolov, M.K., Riedinger, L L, Kondev, Filip G, Janssens, R V F, Abu Saleem, K, Ahmad, I., Balabanski, D, Carpenter, M P, Chowdhury, P, Cullen, D M, Danchev, M., Dracoulis, George, El Masri, H, Goon, J., Heinz, A, Kaye, R A, Khoo, T, Lauritsen, T, Lister, C J, Moore, E.F., Riley, M.A., Seweryniak, D, Shestakova, I, Sletten, G, Walker, Philip M, Wheldon, C, Wiedenhover, I, Zeidan, O, and Zhang, Jing-ye
- Published
- 2003
28. High-spin States, Lifetime Measurements and Isomers in 181 OS
- Author
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Cullen, D M, Pattison, L, Smith, J F, Fletcher, A M, Walker, Philip M, El Masri, H, Podolyak, Zs., Wood, Robert, Scholey, C, Wheldon, C, Mukherjee, G, Balabanski, D, Djongolov, M.K., Dalsgaard, Th., Thisgaard, H, Sletten, G, Kondev, Filip G, Jenkins, D G, Dracoulis, George, Lane, Gregory, Lee, I-Y, Macchiavelli, A O, Xu, Furong, Cullen, D M, Pattison, L, Smith, J F, Fletcher, A M, Walker, Philip M, El Masri, H, Podolyak, Zs., Wood, Robert, Scholey, C, Wheldon, C, Mukherjee, G, Balabanski, D, Djongolov, M.K., Dalsgaard, Th., Thisgaard, H, Sletten, G, Kondev, Filip G, Jenkins, D G, Dracoulis, George, Lane, Gregory, Lee, I-Y, Macchiavelli, A O, and Xu, Furong
- Abstract
The level scheme of 18176Os has been investigated with the 150Nd(36S,5n) reaction. The low-K rotational bands built upon the 9/2+[624], 7/2- [514] and 1/2-[521] neutron configurations have been extended and other new bands established. The configurations
- Published
- 2003
29. Nuclear Mass Visualization and Analysis at nuclearmasses.org
- Author
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Smith, Michael S., primary, Lingerfelt, Eric J., additional, Nesaraja, Caroline D., additional, Koura, Hiroyuki, additional, Kondev, Filip G., additional, Tanihara, Isao, additional, Ong, Hooi Jin, additional, Tamii, Atsushi, additional, Kishimoto, Tadafumi, additional, Kajino, Toshitaka, additional, Kubono, Shigeru, additional, and Shima, Tatsushi, additional
- Published
- 2010
- Full Text
- View/download PDF
30. Observation of Excited States in the Near-Drip-Line Nucleus 125 Pr
- Author
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Wilson, Anna, LaFosse, D R, Smith, John Robert, Chiara, C J, Boston, A.J., Carpenter, M P, Chantler, H, Charity, R, Choy, P T W, Devlin, M, Fletcher, A M, Fossan, D B, Janssens, R V F, Jenkins, D G, Kelsall, N, Kondev, Filip G, Koike, T, Paul, E, Sarantites, D G, Seweryniak, D, Starosta, K, Wadsworth, R, Wilson, Anna, LaFosse, D R, Smith, John Robert, Chiara, C J, Boston, A.J., Carpenter, M P, Chantler, H, Charity, R, Choy, P T W, Devlin, M, Fletcher, A M, Fossan, D B, Janssens, R V F, Jenkins, D G, Kelsall, N, Kondev, Filip G, Koike, T, Paul, E, Sarantites, D G, Seweryniak, D, Starosta, K, and Wadsworth, R
- Abstract
High-spin states have been observed in the near-drip-line nucleus 125Pr following the reaction 64Zn(64Zn,p2n). The detection of charged particles and neutrons evaporated from the compound system, along with the M/q of the recoiling nucleus, have allowed the identification of excited states in 125Pr and the unambiguous assignment of five rotational structures to this nucleus. This is the most neutron-deficient Pr isotope in which excited states have been observed. The strongest band is identified as the h11/2 single-quasiproton configuration, and is observed to a maximum spin of I = (67/2hℏ). Another structure is interpreted as the g9/2 proton hole state, which is associated with bands of enhanced deformation observed in several nuclei in this mass region. These two bands are compared with analogous bands in the heavier odd-A Pr isotopes and changes in deformation are discussed.
- Published
- 2002
31. Thermal equilibration ofLu176viaKmixing
- Author
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Gintautas, Vadas, primary, Champagne, Arthur E., additional, Kondev, Filip G., additional, and Longland, Richard, additional
- Published
- 2009
- Full Text
- View/download PDF
32. Studies of neutron-deficient nuclei near the Z = 82 shell closure via cold fusion reactions
- Author
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Carpenter, Michael P, primary, Kondev, Filip G, additional, and Janssens, Robert V F, additional
- Published
- 2005
- Full Text
- View/download PDF
33. THE NUCLEAR MASS AT FINITE ANGULAR MOMENTA
- Author
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RAGNARSSON, INGEMAR, primary, KONDEV, FILIP G., additional, PAUL, EDWARD S., additional, RILEY, MARK A., additional, and SIMPSON, JOHN, additional
- Published
- 2004
- Full Text
- View/download PDF
34. Nuclear Structure and Decay Data: Current Status and Future Perspectives.
- Author
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Kondev, Filip G. and Tuli, Jagdish K.
- Subjects
- *
DATABASES , *ELECTRONIC information resources , *INFORMATION resources , *NUCLEAR structure , *NUCLEAR physics - Abstract
The nuclear structure databases provide physicists around the world with a useful collection of reliable and well documented datasets. The Evaluated Nuclear Structure Data File (ENSDF) database, produced by the International Nuclear Structure and Decay Data Network (NSDD) under the auspices of the International Atomic Energy Agency (IAEA), contains evaluated experimental information for all known nuclei. The bibliographical database Nuclear Science References (NSR) provides references to published data in the field of Nuclear Physics. The Experimental Unevaluated Nuclear Data List (XUNDL) provides a method for rapid access to formatted (compiled) data from recently published articles. Detailed information regarding these databases, as well as other products and services, can be found at the National Nuclear Data Center (NNDC) and IAEA web portals. © 2006 American Institute of Physics [ABSTRACT FROM AUTHOR]
- Published
- 2006
- Full Text
- View/download PDF
35. Shape Coexistence at the Outer Edges of Stability.
- Author
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Carpenter, Michael P., Kondev, Filip G., and Janssens, Robert V. F.
- Subjects
- *
GAMMASPHERE , *GAMMA ray detectors , *NUCLEAR counters , *NUCLEAR excitation , *NUCLEAR size (Physics) , *NUCLEAR structure , *NUCLEAR physics , *PHYSICS - Abstract
A major program of Gammasphere when coupled with the Fragment Mass Analyzer (FMA) has been to study excited states in nuclei beyond the proton drip line. We have recently performed in-beam experiments using Gammasphere + FMA to measure excited states in proton rich Au, Hg, Tl and Pb isotopes. These studies have allowed us to characterize the evolution of nuclear shapes as one approaches the proton drip line. In two of the isotopes studied, namely 175Au and 179Hg, structures built on three distinct shapes have been found to coexist at low excitation energy. © 2005 American Institute of Physics [ABSTRACT FROM AUTHOR]
- Published
- 2005
- Full Text
- View/download PDF
36. Comparison of nuclear mass models at nuclearmasses.org.
- Author
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Smith, Michael S., Nesaraja, Caroline D., Lingerfelt, Eric J., Koura, Hiroyuki, and Kondev, Filip G.
- Subjects
COMPARATIVE studies ,ATOMIC mass ,ASTROPHYSICS ,NUCLEAR science ,NUCLEAR models ,STANDARD deviations - Abstract
Nuclear masses are crucial in many astrophysics studies, as well as other areas of basic and applied nuclear science. There are now many different global theoretical models of nuclear masses - but choosing the best model for a given application can be challenging. The suite of codes online at nuclearmasses.org greatly facilitates the comparison of nuclear models with evaluated masses as well as the intercomparison of theoretical models. We demonstrate the utility of this suite by comparing the RMS deviations of 13 different theoretical mass models from the AME2003 evaluated masses over mass ranges appropriate for astrophysics. [ABSTRACT FROM AUTHOR]
- Published
- 2012
- Full Text
- View/download PDF
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