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22 results on '"Nieto, T. Kurtukian"'

1. Status on the DESIR High Resolution Separator Commissioning

Author

Michaud, J., Alfaurt, P., Balana, A., Blank, B., Daudin, L., Nieto, T. Kurtukian, Lachacinski, B., Serani, L., and Varenne, F.

Subjects
Physics - Instrumentation and Detectors, Nuclear Experiment
Abstract

Many nuclear reactions used to create radioactive isotopes for nuclear research produce, in addition to the isotope of interest, many contaminants, which are often produced in much larger amounts than the isotope of interest. Many installations using the ISOL approach are therefore equipped with high-resolution mass separators to remove at least isotopes with a different mass number. In the present paper, we present the results of the commissioning of the DESIR HRS presently under development at LP2I Bordeaux (formerly CENBG). Optical aberrations are corrected up to 3rd order and a mass resolution of M/$\Delta$M of 25000 is reached with a transmission of about 70% for a 133Cs+ beam at 25 keV.

Published
2022

2. Precision efficiency calibration of a high-purity co-axial germanium detector at low energies

Author

Blank, B., Ascher, P., Gerbaux, M., Giovinazzo, J., Grevy, S., Nieto, T. Kurtukian, Versteegen, M., and Thomas, J. C.

Subjects
Physics - Instrumentation and Detectors, Nuclear Experiment
Abstract

Following work done in the energy region above 100 keV, the high-precision calibration of a co-axial high-purity germanium detector has been continued in the energy region below 100 keV. Previous measurements or Monte-Carlo simulations have been repeated with higher statistics and new source measurements have been added. A precision as in the high-energy part, i.e. an absolute precision for the detection efficiency of 0.2%, has been reached. The low-energy behaviour of the germanium detector was further scrutinized by studying the germanium X-ray escape probability for the detection of low-energy photons. In addition, one experimental point, a gamma ray at 2168 keV from the decay of 38K, has been included for the total-to-peak ratios agreeing well with simulations. The same gamma ray was also added for the single- and double-escape probabilities. Finally, the long term stability of the efficiency of the germanium detector was investigated by regularly measuring the full-energy peak efficiency with a precisely calibrated 60Co source and found to be perfectly stable over a period of 10 years.

Published
2020

3. Branching ratio of the super-allowed beta decay of 10C

Author

Blank, B., Aouadi, M., Ascher, P., Gerbaux, M., Giovinazzo, J., Grevy, S., Nieto, T. Kurtukian, Dunlop, M. R., Dunlop, R., Laffoley, A. T., Grinyer, G. F., and Finlay, P.

Subjects
Nuclear Experiment
Abstract

In an experiment performed at the ISOLDE facility of CERN, the super-allowed beta-decay branching ratio of 10C was determined with a high-precision single-crystal germanium detector. In order to evaluate the contribution of the pile-up of two 511 keV gamma quanta to one of the gamma-ray peaks of interest at 1021.7 keV, data were not only taken with 10C, but also with a 19Ne beam. The final result for the super-allowed decay branch is 1.4638(50)%, in agreement with the average from literature.

Published
2020
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4. Simultaneous investigation of the $\mathbf{T=1~ (J^{\pi}=0^+)}$ and $\mathbf{T=0 ~ (J^{\pi}=9^+)}$ $\beta$ decays in $^{70}$Br

Author

Morales, A. I., Algora, A., Rubio, B., Kaneko, K., Nishimura, S., Aguilera, P., Orrigo, S. E. A., Molina, F., de Angelis, G., Recchia, F., Kiss, G., Phong, V. H., Wu, J., Nishimura, D., Oikawa, H., Goigoux, T., Giovinazzo, J., Ascher, P., Agramunt, J., Ahn, D. S., Baba, H., Blank, B., Borcea, C., Boso, A., Davies, P., Diel, F., Dombrádi, Zs., Doornenbal, P., Eberth, J., de France, G., Fujita, Y., Fukuda, N., Ganioglu, E., Gelletly, W., Gerbaux, M., Grévy, S., Guadilla, V., Inabe, N., Isobe, T., Korten, W., Kubo, T., Kubono, S., Nieto, T. Kurtukián, Lenzi, S., Lubos, D., Magron, C., Montaner-Pizá, A., Napoli, D. R., Sakurai, H., Shimizu, Y., Sidong, C., Söderström, P. -A., Sumikama, T., Suzuki, H., Takeda, H., Takei, Y., Tanaka, M., and Yagi, S.

Subjects
Nuclear Experiment
Abstract

The $\beta$ decay of the odd-odd nucleus $^{70}$Br has been investigated with the BigRIPS and EURICA setups at the Radioactive Ion Beam Factory (RIBF) of the RIKEN Nishina Center. The $T=0$ ($J^{\pi}=9^+$) and $T=1$ ($J^{\pi}=0^+$) isomers have both been produced in in-flight fragmentation of $^{78}$Kr with ratios of 41.6(8)\% and 58.4(8)\%, respectively. A half-life of $t_{1/2}=2157^{+53}_{-49}$ ms has been measured for the $J^{\pi}=9^+$ isomer from $\gamma$-ray time decay analysis. Based on this result, we provide a new value of the half-life for the $J^{\pi}=0^+$ ground state of $^{70}$Br, $t_{1/2}=78.42\pm0.51$ ms, which is slightly more precise, and in excellent agreement, with the best measurement reported hitherto in the literature. For this decay, we provide the first estimate of the total branching fraction decaying through the $2^+_1$ state in the daughter nucleus $^{70}$Se, $R(2^+_1)=1.3\pm1.1\%$. We also report four new low-intensity $\gamma$-ray transitions at 661, 1103, 1561, and 1749 keV following the $\beta$ decay of the $J^{\pi}=9^+$ isomer. Based on their coincidence relationships, we tentatively propose two new excited states at 3945 and 4752 keV in $^{70}$Se with most probable spins and parities of $J^{\pi}=(6^+)$ and $(8^+)$, respectively. The observed structure is interpreted with the help of shell-model calculations, which predict a complex interplay between oblate and prolate configurations at low excitation energies.

Published
2017
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5. New neutron-deficient isotopes from $^{78}$Kr fragmentation

Author

Blank, B., Goigoux, T., Ascher, P., Gerbaux, M., Giovinazzo, J., Grevy, S., Nieto, T. Kurtukian, Magron, C., Agramunt, J., Algora, A., Guadilla, V., Montaner-Piza, A., Morales, A. I., Orrigo, S. E. A., Rubio, B., Ahn, D. S., Doornenbal, P., Fukuda, N., Inabe, N., Kiss, G., Kubo, T., Kubono, S., Nishimura, S., Phong, V. H., Sakurai, H., Shimizu, Y., Soderstrom, P. -A., Sumikama, T., Suzuki, H., Takeda, H., Wu, J., Fujita, Y., Tanaka, M., Gelletly, W., Aguilera, P., Molina, F., Diel, F., Lubos, D., de Angelis, G., Napoli, D., Borcea, C., Boso, A., Cakirli, R. B., Ganioglu, E., Chiba, J., Nishimura, D., Oikawa, H., Takei, Y., Yagi, S., Wimmer, K., de France, G., and Go, S.

Subjects
Nuclear Experiment
Abstract

In an experiment with the BigRIPS separator at the RIKEN Nishina Center, the fragmentation of a $^{78}$Kr beam allowed the observation of new neutron-deficient isotopes at the proton drip-line. Clean identification spectra could be produced and $^{63}$Se, $^{67}$Kr, and $^{68}$Kr were identified for the first time. In addition, $^{59}$Ge was also observed. Three of these isotopes, $^{59}$Ge, $^{63}$Se, and $^{67}$Kr, are potential candidates for ground-state two-proton radioactivity. In addition, the isotopes $^{58}$Ge, $^{62}$Se, and $^{66}$Kr were also sought but without success. The present experiment also allowed the determination of production cross sections for some of the most exotic isotopes. These measurements confirm the trend already observed that the empirical parameterization of fragmentation cross sections, EPAX, significantly overestimates experimental cross sections in this mass region., Comment: accepted as Rapid Communication in PRC

Published
2016
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6. High-precision efficiency calibration of a high-purity co-axial germanium detector

Author

Blank, B., Souin, J., Ascher, P., Audirac, L., Canchel, G., Gerbaux, M., Grevy, S., Giovinazzo, J., Guerin, H., Nieto, T. Kurtukian, Matea, I., Bouzomita, H., Delahaye, P., Grinyer, G. F., and Thomas, J. C.

Subjects
Physics - Instrumentation and Detectors, Nuclear Experiment
Abstract

A high-purity co-axial germanium detector has been calibrated in efficiency to a precision of about 0.15% over a wide energy range. High-precision scans of the detector crystal and gamma-ray source measurements have been compared to Monte-Carlo simulations to adjust the dimensions of a detector model. For this purpose, standard calibration sources and short-lived on-line sources have been used. The resulting efficiency calibration reaches the precision needed e.g. for branching ratio measurements of super-allowed beta decays for tests of the weak-interaction standard model.

Published
2014
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9. The beta-decay of Kr-70 into Br-70: Restoration of the pseudo-SU(4) symmetry

Author

Vitez-Sveiczer, A., Algora, A., Morales, A., I, Rubio, B., Kiss, G. G., Sarriguren, P., Van Isacker, P., de Angelis, G., Recchia, F., Nishimura, S., Agramunt, J., Guadilla, V, Montaner-Piza, A., Orrigo, S. E. A., Horvath, A., Napoli, D., Lenzi, S., Boso, A., Phong, V. H., Wu, J., Soderstrom, P-A, Sumikama, T., Suzuki, H., Takeda, H., Ahn, D. S., Baba, H., Doornebal, P., Fukuda, N., Inabe, N., Isobe, T., Kubo, T., Kubono, S., Sakurai, H., Shimizu, Y., Sidong, C., Blank, B., Ascher, P., Gerbaux, M., Goigoux, T., Giovinazzo, J., Grevy, S., Nieto, T. Kurtukian, Magron, C., Gelletly, W., Dombradi, Zs, Fujita, Y., Tanaka, M., Aguilera, P., Molina, F., Eberth, J., Diel, F., Lubos, D., Borcea, C., Ganioglu, E., Nishimura, D., Oikawa, H., Takei, Y., Yagi, S., Korten, W., de France, G., Davies, P., Liu, J., Lee, J., Lokotko, T., Kojouharov, I, Kurz, N., Shaffner, H., Petrovici, A., Vitez-Sveiczer, A., Algora, A., Morales, A., I, Rubio, B., Kiss, G. G., Sarriguren, P., Van Isacker, P., de Angelis, G., Recchia, F., Nishimura, S., Agramunt, J., Guadilla, V, Montaner-Piza, A., Orrigo, S. E. A., Horvath, A., Napoli, D., Lenzi, S., Boso, A., Phong, V. H., Wu, J., Soderstrom, P-A, Sumikama, T., Suzuki, H., Takeda, H., Ahn, D. S., Baba, H., Doornebal, P., Fukuda, N., Inabe, N., Isobe, T., Kubo, T., Kubono, S., Sakurai, H., Shimizu, Y., Sidong, C., Blank, B., Ascher, P., Gerbaux, M., Goigoux, T., Giovinazzo, J., Grevy, S., Nieto, T. Kurtukian, Magron, C., Gelletly, W., Dombradi, Zs, Fujita, Y., Tanaka, M., Aguilera, P., Molina, F., Eberth, J., Diel, F., Lubos, D., Borcea, C., Ganioglu, E., Nishimura, D., Oikawa, H., Takei, Y., Yagi, S., Korten, W., de France, G., Davies, P., Liu, J., Lee, J., Lokotko, T., Kojouharov, I, Kurz, N., Shaffner, H., and Petrovici, A.

Abstract

The beta-decay of the even-even nucleus Kr-70 with Z=N+2, has been investigated at the Radioactive Ion Beam Factory (RIBF) of the RIKEN Nishina Center using the BigRIPS fragment separator, the ZeroDegree Spectrometer, the WAS3ABI implantation station and the EURICA HPGe cluster array. Fifteen gamma-rays associated with the beta-decay of( 70)Kr into Br-70 have been identified for the first time, defining ten populated states below E-exc=3300 keV. The half-life of Kr-70 was derived with increased precision and found to be t(1/2)=45.19 +/- 0.14 ms. The beta-delayed proton emission probability has also been determined as epsilon(p)=0.545(23)%. An increase in the beta-strength to the yrast 1(+) state in comparison with the heaviest Z=N+2 system studied so far (Ge-62 decay) is observed that may indicate increased np correlations in the T=0 channel. The beta-decay strength deduced from the results is interpreted in terms of the proton-neutron quasiparticle random-phase approximation (pnQRPA) and also with a schematic model that includes isoscalar and isovector pairing in addition to quadrupole deformation. The application of this last model indicates an approximate realization of pseudo-SU(4) symmetry in this system. (C) 2022 The Author(s). Published by Elsevier B.V.

Published
2022

11. Branching ratio of the super-allowed $$\beta $$ decay of $$^{10}$$C

Author

Blank, B., primary, Aouadi, M., additional, Ascher, P., additional, Gerbaux, M., additional, Giovinazzo, J., additional, Grévy, S., additional, Nieto, T. Kurtukian, additional, Dunlop, M. R., additional, Dunlop, R., additional, Laffoley, A. T., additional, Grinyer, G. F., additional, and Finlay, P., additional

Published
2020
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12. Kr-67 TWO-PROTON RADIOACTIVITY: RESULTS AND THEORETICAL INTERPRETATIONS

Author

Goigoux, T., Ascher, P., Blank, B., Gerbaux, M., Giovinazzo, J., Grevy, S., Nieto, T. Kurtukian, Magron, C., Ahn, D. S., Doornenbal, P., Fukuda, N., Inabe, N., Kiss, G., Kubo, T., Kubono, S., Nishimura, S., Sakurai, H., Shimizu, Y., Sidong, C., Soderstrom, P-A, Sumikama, T., Suzuki, H., Takeda, H., Vi, P., Wu, J., Fujita, Y., Tanaka, M., Agramunt, J., Algora, A., Guadilla, V, Montaner-Piza, A., Morales, A., I, Orrigo, S. E. A., Rubio, B., Gelletly, W., Aguilera, P., Molina, F., Diel, F., Lubos, D., de Angelis, G., Napoli, D., Borcea, C., Boso, A., Cakirli, R. B., Ganioglu, E., Chiba, J., Nishimura, D., Oikawa, H., Takei, Y., Yagi, S., Wimmer, K., De France, G., Go, S., Brown, B. A., Goigoux, T., Ascher, P., Blank, B., Gerbaux, M., Giovinazzo, J., Grevy, S., Nieto, T. Kurtukian, Magron, C., Ahn, D. S., Doornenbal, P., Fukuda, N., Inabe, N., Kiss, G., Kubo, T., Kubono, S., Nishimura, S., Sakurai, H., Shimizu, Y., Sidong, C., Soderstrom, P-A, Sumikama, T., Suzuki, H., Takeda, H., Vi, P., Wu, J., Fujita, Y., Tanaka, M., Agramunt, J., Algora, A., Guadilla, V, Montaner-Piza, A., Morales, A., I, Orrigo, S. E. A., Rubio, B., Gelletly, W., Aguilera, P., Molina, F., Diel, F., Lubos, D., de Angelis, G., Napoli, D., Borcea, C., Boso, A., Cakirli, R. B., Ganioglu, E., Chiba, J., Nishimura, D., Oikawa, H., Takei, Y., Yagi, S., Wimmer, K., De France, G., Go, S., and Brown, B. A.

Abstract

The two-proton radioactivity is a unique tool to study the nuclear structure beyond the proton drip-line. Since its discovery in 2002, the known emitters have been Mg-19, Fe-45, Ni-48, Zn-54 and Kr-67. Kr-67 was observed for the first time at the RIKEN Nishina Center in 2015. Its decay energy was measured at 1690(17) keV with a branching ratio of 37(14) %. The halflife, 7.4(30) ms, was found in contradiction with theoretical calculations, pointing out effects of decay dynamics and nuclear deformation.

Published
2019

13. Precise measurements of half-lives and branching ratios for the ββ mirror transitions in the decay of 23Mg and 27Si

Author

Magron, C., Alfaurt, Ph., Blank, B., Daudin, L., Eronen, Tommi, Gerbaux, M., Giovinazzo, J., Gorelov, Dmitry, Grévy, S., Guérin, H., Hakala, Jani, Kolhinen, Veli, Koponen, Jukka, Nieto, T. Kurtukian, Moore, Iain, Penttilä, Heikki, Pohjalainen, Ilkka, Reinikainen, Juuso, Reponen, Mikael, Rinta-Antila, Sami, Roche, M., Roubin, A. de, Smirnova, N., Thomas, B., Voss, Annika, and Xayavong, L.

Subjects
branching ratios, half-lives, mirror transitions
Abstract

Half-lives and branching ratios for the two mirror ββ decays of 23Mg and 27Si have been measured at the University of Jyväskylä with the IGISOL facility. The results obtained, T1/2=11.303(3)T1/2=11.303(3) s and T1/2=4.112(2)T1/2=4.112(2) s for the half-lives of 23Mg and 27Si , respectively, are 7 and 8 times more precise than the averages of previous measurements. The values obtained for the super-allowed branching ratios of 23Mg and 27Si are B.R.=92.18(8)%B.R.=92.18(8)% and B.R.=99.74(2)%B.R.=99.74(2)% , respectively. The result for 23Mg is three times more precise than the average of the previous measurements, while for 27Si the precision has not been improved, the average of the previous measurements being already very precise. Isospin-symmetry-breaking corrections have been calculated for the two nuclei to determine the corrected FtFt value. peerReviewed

Published
2017

14. Branching ratio of the super-allowed β decay of 10C.

Author

Blank, B., Aouadi, M., Ascher, P., Gerbaux, M., Giovinazzo, J., Grévy, S., Nieto, T. Kurtukian, Dunlop, M. R., Dunlop, R., Laffoley, A. T., Grinyer, G. F., and Finlay, P.

Subjects
GERMANIUM detectors, BRANCHING ratios
Abstract

In an experiment performed at the ISOLDE facility of CERN, the super-allowed β -decay branching ratio of 10 C was determined with a high-precision single-crystal germanium detector. In order to evaluate the contribution of the pile-up of two 511 keV γ quanta to one of the γ -ray peaks of interest at 1021.7 keV, data were not only taken with 10 C, but also with a 19 Ne beam. The final result for the super-allowed decay branch is 1.4638(50)%, in agreement with the average from literature. [ABSTRACT FROM AUTHOR]

Published
2020
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15. Simultaneous investigation of the T=1(J(pi)=0(+)) and T=0(J(pi)=9(+)) beta decays in Br-70

Author

Morales, A. I., Algora, A., Rubio, B., Kaneko, K., Nishimura, S., Aguilera, P., Orrigo, S. E. A., Molina, F., de Angelis, G., Recchia, F., Kiss, G., Phong, V. H., Wu, J., Nishimura, D., Oikawa, H., Goigoux, T., Giovinazzo, J., Ascher, P., Agramunt, J., Ahn, D. S., Baba, H., Blank, B., Borcea, C., Boso, A., Davies, P., Diel, F., Dombardi, Zs., Doornenbal, P., Eberth, J., de France, G., Fujita, Y., Fukuda, N., Ganioglu, E., Gelletly, W., Gerbaux, M., Grevy, S., Guadilla, V., Inabe, N., Isobe, T., Kojouharov, I., Korten, W., Kubo, T., Kubono, S., Nieto, T. Kurtukian, Kurz, N., Lee, J., Lenzi, S., Liu, J., Lokotko, T., Lubos, D., Magron, C., Montaner-Piza, A., Napoli, D. R., Sakurai, H., Schaffner, H., Shimizu, Y., Sidong, C., Soderstrom, P. -A., Sumikama, T., Suzuki, H., Takeda, H., Takei, Y., Tanaka, M., Yagi, S., Morales, A. I., Algora, A., Rubio, B., Kaneko, K., Nishimura, S., Aguilera, P., Orrigo, S. E. A., Molina, F., de Angelis, G., Recchia, F., Kiss, G., Phong, V. H., Wu, J., Nishimura, D., Oikawa, H., Goigoux, T., Giovinazzo, J., Ascher, P., Agramunt, J., Ahn, D. S., Baba, H., Blank, B., Borcea, C., Boso, A., Davies, P., Diel, F., Dombardi, Zs., Doornenbal, P., Eberth, J., de France, G., Fujita, Y., Fukuda, N., Ganioglu, E., Gelletly, W., Gerbaux, M., Grevy, S., Guadilla, V., Inabe, N., Isobe, T., Kojouharov, I., Korten, W., Kubo, T., Kubono, S., Nieto, T. Kurtukian, Kurz, N., Lee, J., Lenzi, S., Liu, J., Lokotko, T., Lubos, D., Magron, C., Montaner-Piza, A., Napoli, D. R., Sakurai, H., Schaffner, H., Shimizu, Y., Sidong, C., Soderstrom, P. -A., Sumikama, T., Suzuki, H., Takeda, H., Takei, Y., Tanaka, M., and Yagi, S.

Abstract

The beta decay of the odd-odd nucleus Br-70 has been investigated with the BigRIPS and EURICA setups at the Radioactive Ion Beam Factory (RIBF) of the RIKEN Nishina Center. The T = 0(J(pi) = 9(+)) and T = 1(J(pi) = 0(+)) isomers have both been produced in in-flight fragmentation of Kr-78 with ratios of 41.6(8)% and 58.4(8)%, respectively. A half-life of t(1/2) = 2157(-49)(+53) ms has been measured for the J pi = 9(+) isomer from gamma-ray time decay analysis. Based on this result, we provide a new value of the half-life for the J pi = 0(+) ground state of Br-70, t(1/2) = 78.42 +/- 0.51 ms, which is slightly more precise, and in excellent agreement, with the best measurement reported hitherto in the literature. For this decay, we provide the first estimate of the total branching fraction decaying through the 2(1)(+) state in the daughter nucleus Se-70, R(2(1)(+)) = 1.3 +/- 1.1%. We also report four new low-intensity gamma-ray transitions at 661, 1103, 1561, and 1749 keV following the beta decay of the J pi = 9(+) isomer. Based on their coincidence relationships, we tentatively propose two new excited states at 3945 and 4752 keV in 70Se with most probable spins and parities of J(pi) = (6(+)) and (8(+)), respectively. The observed structure is interpreted with the help of shell-model calculations, which predict a complex interplay between oblate and prolate configurations at low excitation energies.

Published
2017

16. 67Kr TWO-PROTON RADIOACTIVITY: RESULTS AND THEORETICAL INTERPRETATIONS.

Author

GOIGOUX, T., ASCHER, P., BLANK, B., GERBAUX, M., GIOVINAZZO, J., GRÉVY, S., NIETO, T. KURTUKIAN, MAGRON, C., AHN, D. S., DOORNENBAL, P., FUKUDA, N., INABE, N., KISS, G., KUBO, T., KUBONO, S., NISHIMURA, S., SAKURAI, H., SHIMIZU, Y., SIDONG, C., and SÖDERSTRÖM, P.-A.

Subjects
NUCLEAR structure, RADIOACTIVE decay, BRANCHING ratios, KRYPTON, RADIOACTIVITY, NUCLEAR shapes
Abstract

The two-proton radioactivity is a unique tool to study the nuclear structure beyond the proton drip-line. Since its discovery in 2002, the known emitters have been 19Mg, 45Fe, 48Ni, 54Zn and 67Kr. 67Kr was observed for the first time at the RIKEN Nishina Center in 2015. Its decay energy was measured at 1690(17) keV with a branching ratio of 37(14)%. The halflife, 7:4(30) ms, was found in contradiction with theoretical calculations, pointing out effects of decay dynamics and nuclear deformation. [ABSTRACT FROM AUTHOR]

Published
2019
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17. New neutron-deficient isotopes from Kr-78 fragmentation

Author

Blank, B., Goigoux, T., Ascher, P., Gerbaux, M., Giovinazzo, J., Grevy, S., Nieto, T. Kurtukian, Magron, C., Agramunt, J., Algora, A., Guadilla, V., Montaner-Piza, A., Morales, A. I., Orrigo, S. E. A., Rubio, B., Ahn, D. S., Doornenbal, P., Fukuda, N., Inabe, N., Kiss, G., Kubo, T., Kubono, S., Nishimura, S., Phong, V. H., Sakurai, H., Shimizu, Y., Soderstrom, P. -A., Sumikama, T., Suzuki, H., Takeda, H., Wu, J., Fujita, Y., Tanaka, M., Gelletly, W., Aguilera, P., Molina, F., Diel, F., Lubos, D., de Angelis, G., Napoli, D., Borcea, C., Boso, A., Cakirli, R. B., Ganioglu, E., Chiba, J., Nishimura, D., Oikawa, H., Takei, Y., Yagi, S., Wimmer, K., de France, G., Go, S., Blank, B., Goigoux, T., Ascher, P., Gerbaux, M., Giovinazzo, J., Grevy, S., Nieto, T. Kurtukian, Magron, C., Agramunt, J., Algora, A., Guadilla, V., Montaner-Piza, A., Morales, A. I., Orrigo, S. E. A., Rubio, B., Ahn, D. S., Doornenbal, P., Fukuda, N., Inabe, N., Kiss, G., Kubo, T., Kubono, S., Nishimura, S., Phong, V. H., Sakurai, H., Shimizu, Y., Soderstrom, P. -A., Sumikama, T., Suzuki, H., Takeda, H., Wu, J., Fujita, Y., Tanaka, M., Gelletly, W., Aguilera, P., Molina, F., Diel, F., Lubos, D., de Angelis, G., Napoli, D., Borcea, C., Boso, A., Cakirli, R. B., Ganioglu, E., Chiba, J., Nishimura, D., Oikawa, H., Takei, Y., Yagi, S., Wimmer, K., de France, G., and Go, S.

Abstract

In an experiment with the RIKEN projectile fragment separator called BigRIPS at the RIKEN Nishina Center, the fragmentation of a Kr-78 beam allowed the observation of new neutron-deficient isotopes at the proton drip line. Clean identification spectra could be produced and Se-63, Kr-67, and Kr-68 were identified for the first time. In addition, Ge-59 was also observed. Three of these isotopes, Ge-59, Se-63, and Kr-67, are potential candidates for ground-state two-proton radioactivity. In addition, the isotopes Ge-58, Se-62, and Kr-66 were also sought but without success. The present experiment also allowed the determination of production cross sections for some of the most exotic isotopes. These measurements confirm the trend already observed that the empirical parametrization of fragmentation cross sections, EPAX, significantly overestimates experimental cross sections in this mass region.

Published
2016

18. Two-Proton Radioactivity of Kr-67

Author

Goigoux, T., Ascher, P., Blank, B., Gerbaux, M., Giovinazzo, J., Grevy, S., Nieto, T. Kurtukian, Magron, C., Doornenbal, P., Kiss, G. G., Nishimura, S., Soederstroem, P. -A., Phong, V. H., Wu, J., Ahn, D. S., Fukuda, N., Inabe, N., Kubo, T., Kubono, S., Sakurai, H., Shimizu, Y., Sumikama, T., Suzuki, H., Takeda, H., Agramunt, J., Algora, A., Guadilla, V., Montaner-Piza, A., Morales, A. I., Orrigo, S. E. A., Rubio, B., Fujita, Y., Tanaka, M., Gelletly, W., Aguilera, P., Molina, F., Diel, F., Lubos, D., de Angelis, G., Napoli, D., Borcea, C., Boso, A., Cakirli, R. B., Ganioglu, E., Chiba, J., Nishimura, D., Oikawa, H., Takei, Y., Yagi, S., Wimmer, K., de France, G., Go, S., Brown, B. A., Goigoux, T., Ascher, P., Blank, B., Gerbaux, M., Giovinazzo, J., Grevy, S., Nieto, T. Kurtukian, Magron, C., Doornenbal, P., Kiss, G. G., Nishimura, S., Soederstroem, P. -A., Phong, V. H., Wu, J., Ahn, D. S., Fukuda, N., Inabe, N., Kubo, T., Kubono, S., Sakurai, H., Shimizu, Y., Sumikama, T., Suzuki, H., Takeda, H., Agramunt, J., Algora, A., Guadilla, V., Montaner-Piza, A., Morales, A. I., Orrigo, S. E. A., Rubio, B., Fujita, Y., Tanaka, M., Gelletly, W., Aguilera, P., Molina, F., Diel, F., Lubos, D., de Angelis, G., Napoli, D., Borcea, C., Boso, A., Cakirli, R. B., Ganioglu, E., Chiba, J., Nishimura, D., Oikawa, H., Takei, Y., Yagi, S., Wimmer, K., de France, G., Go, S., and Brown, B. A.

Abstract

In an experiment with the BigRIPS separator at the RIKEN Nishina Center, we observed two-proton (2p) emission from Kr-67. At the same time, no evidence for 2p emission of Ge-59 and Se-63, two other potential candidates for this exotic radioactivity, could be observed. This observation is in line with Q value predictions which pointed to Kr-67 as being the best new candidate among the three for two-proton radioactivity. Kr-67 is only the fourth 2p ground-state emitter to be observed with a half-life of the order of a few milliseconds. The decay energy was determined to be 1690(17) keV, the 2p emission branching ratio is 37(14)%, and the half-life of Kr-67 is 7.4(30) ms.

Published
2016

19. Super-Allowed β Decay of23Mg Studied with a High-Precision Germanium Detector

Author

Blank, B., primary, Magron, C., additional, Alfaurt, Ph., additional, Gerbaux, M., additional, Giovinazzo, J., additional, Grévy, S., additional, Guérin, H., additional, Nieto, T. Kurtukian, additional, Roche, M., additional, Eronen, T., additional, Gorelov, D., additional, Hakala, J., additional, Jokinen, A., additional, Kolhinen, V. S., additional, Koponen, J., additional, Moore, I. D., additional, Penttilä, H., additional, Pohjalainen, I., additional, Reinikainen, J., additional, Reponen, M., additional, Rinta-Antila, S., additional, Voss, A., additional, Bouzomita, H., additional, Delahaye, P., additional, Grinyer, G. F., additional, Thomas, J.-C., additional, and Matea, I., additional

Published
2015
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20. Half-life, branching-ratio, andQ-value measurement for the superallowed0+→0+β+emitterTi42

Author

Nieto, T. Kurtukian, primary, Souin, J., additional, Eronen, T., additional, Audirac, L., additional, Äystö, J., additional, Blank, B., additional, Elomaa, V. -V., additional, Giovinazzo, J., additional, Hager, U., additional, Hakala, J., additional, Jokinen, A., additional, Kankainen, A., additional, Karvonen, P., additional, Kessler, T., additional, Moore, I. D., additional, Penttilä, H., additional, Rahaman, S., additional, Reponen, M., additional, Rinta-Antila, S., additional, Rissanen, J., additional, Saastamoinen, A., additional, Sonoda, T., additional, and Weber, C., additional

Published
2009
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21. RARE ISOTOPES INVESTIGATIONS AT GSI (RISING) USING RELATIVISTIC ION BEAMS

Author

JOLIE, J., primary, ILIE, G., additional, REITER, P., additional, RICHARD, A., additional, SCHERILLO, A., additional, STRIEPLING, T., additional, WARR, N., additional, BANU, A., additional, BECKER, F., additional, BEDNARCZYK, P., additional, DOORNENBAL, P., additional, GERL, J., additional, GRAWE, H., additional, GÓRSKA, M., additional, KOJOUHAROV, I., additional, MANDAL, S., additional, SAITO, N., additional, SAITO, T. R., additional, WOLLERSHEIM, H. -J., additional, MALLION, S., additional, NEYENS, G., additional, TURZO, K., additional, VAN DUPPEN, P., additional, VERMEULEN, N., additional, PODOLYAK, ZS., additional, GELLETLY, W., additional, REGAN, P. H., additional, WALKER, P. M., additional, CATFORD, W. N., additional, LIU, Z., additional, WILLIAMS, S., additional, BLAZHEV, A., additional, LOZEVA, R., additional, DETISTOV, P., additional, ATANASOVA, L., additional, DAMYANOVA, G., additional, GIL, D. CORTINA, additional, BENLLIURE, J., additional, NIETO, T. KURTUKIAN, additional, CASEREJOS, E., additional, DAUGAS, J. M., additional, BELIER, G., additional, MEOT, V., additional, ROIG, O., additional, SIMPSON, G., additional, TSEKHANOVICH, I. S., additional, MATEA, I., additional, SCHWENGNER, R., additional, HASS, M., additional, NARA SINGH, B. S., additional, CHAMOLI, S. K., additional, GOLDRING, G., additional, REGEV, I., additional, VAINTRAUB, S., additional, BALABANSKI, D. L., additional, BIANCO, G. LO, additional, GLADNISHKI, K., additional, SALTARELLI, A., additional, PETRACHE, C., additional, BENZONI, G., additional, BLASI, N., additional, BRACCO, A., additional, CAMERA, F., additional, MILLION, B., additional, LEONI, S., additional, WIELAND, O., additional, MAJ, A., additional, KMIECIK, M., additional, GREBOSZ, J., additional, STYCZEŃ, J., additional, LACH, M., additional, MĘCZYŃSKI, W., additional, MAZUREK, K., additional, PFŰTZNER, M., additional, KORGUL, A., additional, IONESCU-BUJOR, M., additional, IORDACHESCU, A., additional, ZAMFIR, V., additional, JUNGCLAUS, A., additional, GEORGIEV, G., additional, CULLEN, D. M., additional, FREEMAN, S. J., additional, SMITH, A. G., additional, ORLANDI, R., additional, CLARK, R. M., additional, BENTLEY, M. A., additional, HAMMOND, G., additional, WADSWORTH, R., additional, BŰRGER, A., additional, HÜBEL, H., additional, RUDOLPH, D., additional, FAHLANDER, C., additional, SIMPSON, J., additional, HERZBERG, R. D., additional, PAGE, R. D., additional, NOLAN, P., additional, DAVIDSON, T., additional, WOODS, P., additional, BRUCE, A. M., additional, FAESTERMANN, T., additional, KRŰCKEN, R., additional, MACH, H., additional, RUBIO, B., additional, and ALGORA, A., additional

Published
2006
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22. New neutron-deficient isotopes from 78Kr fragmentation.

Author

Blank, B., Goigoux, T., Ascher, P., Gerbaux, M., Giovinazzo, J., Grévy, S., Nieto, T. Kurtukian, Magron, C., Agramunt, J., Algora, A., Guadilla, V., Montaner-Piza, A., Morales, A. I., Orrigo, S. E. A., Rubio, B., Ahn, D. S., Doornenbal, P., Fukuda, N., Inabe, N., and Kiss, G.

Subjects
*NEUTRONS, *KRYPTON compounds, *NUCLEAR cross sections
Abstract

In an experiment with the RIKEN projectile fragment separator called BigRIPS at the RIKEN Nishina Center, the fragmentation of a 78Kr beam allowed the observation of new neutron-deficient isotopes at the proton drip line. Clean identification spectra could be produced and 63Se,67Kr, and 68Kr were identified for the first time. In addition, 59Ge was also observed. Three of these isotopes, 59Ge,63Se, and 67Kr, are potential candidates for ground-state two-proton radioactivity. In addition, the isotopes 58Ge,62Se, and 66Kr were also sought but without success. The present experiment also allowed the determination of production cross sections for some of the most exotic isotopes. These measurements confirm the trend already observed that the empirical parametrization of fragmentation cross sections, EPAX, significantly overestimates experimental cross sections in this mass region. [ABSTRACT FROM AUTHOR]

Published
2016
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