Particle identification for Z = 25 – 28 exotic nuclei from seastar experimental data
Main Article Content
Abstract
The particle identification (PID) method based on TOF-Bρ-ΔE measurement at RIKEN are discussed, and its application for Z = 25 – 28 neutron-rich nuclei from SEASTAR (Shell Evolution And Search for Two-plus energy At RIBF) experimental data are presented. The results including the PID for beam and residual nucleus at BigRIPS and ZeroDegree, respectively, demonstrate that the reactions of interest are well separated. This ensures the precision in the data analysis later on.
Article Details
Keywords
SEASTAR, particle identification, BigRIPS, ZeroDegree
References
[1] I. Tanihata, “Neutron halo nuclei”, J. Phys. G 22, 157, and references therein, 1996.
[2] L. X. Chung et al., “Elastic proton scattering at intermediate energies as a probe of the 6,8He nuclear matter densities”, Physical Review C 92, 034608, 2015.
[3] S. D. Pain et al., “Structure of 12Be: Intruder d-Wave Strength at N=8”, Phys. Rev. Lett. 96, 032502, 2006.
[4] Le Xuan Chung et al., “The dominance of the ν(0d5/2)2 configuration in the N = 8 shell in 12Be from the breakup reaction on a proton target at intermediate energy”, submitted to Physics Letters B, 2017.
[5] O. Sorlin et al., “Nuclear magic number: New features far from stability”, Progress in Particle and Nuclear Physics 61, Issue 2, 602-673, 2008.
[6] T. Kubo, "In-flight RI beam separator BigRIPS at RIKEN and elsewhere in Japan", Nucl. Instr. Meth. B 204, pp. 97-113, 2003.
[7] A.C. Mueller and R. Anne, "Production of and studies with secondary radioactive ion beams at LISE", Nuclear Instruments and Methods in Physics Research B 56, pp. 559-563, 1991.
[8] D.J. Morrissey et al., "Commissioning the A1900 projectile fragment separator" Nuclear Instruments and Methods in Physics Research B 204, pp. 90-96, 2003.
[9] H. Geissel et al., "The GSI projectile fragment separator (FRS): a versatile magnetic system for relativistic heavy ions", Nuclear Instruments and Methods in Physics Research B 70, pp. 286-297, 1992.
[10] P. Doornenbal and A. Obertelli, “Shell Evolution and Systematic Search for 2+1 Energies”, Proposal for Nuclear Physics Experiment at RI Beam Factory RIBF NP-PAC-13, 2013.
[11] A. Obertelli et al., "MINOS: A vertex tracker coupled to a thick liquid-hydrogen target for in-beam spectroscopy of exotic nuclei", Eur. Jour. Phys. A 50, 8, 2014.
[12] P. Doornenbal, "In-beam gamma-ray spectroscopy at the RIBF", Prog. Theor. Exp. Phys., 03C004, 2012.
[13] C. Santamaria, L. X. Chung et al., "Extension of the N=40 Island of Inversion towards N=50: Spectroscopy of Cr66, Fe70,72", Physical Review Letters 115, 192501, 2015.
[14] P.Nancy et al., L.X.Chung, B.D.Linh., “Are There Signatures of Harmonic Oscillator Shells Far from Stability? First Spectroscopy of 110Zr”, Physical Review Letters, 118, 032501, 2017.
[15] F. Flavigny et al., L.X. Chung, B.D. Linh, “Shape Evolution in Neutron-rich Krypton Isotopes beyond N = 60: First spectroscopy of 98,100Kr”, Physical Review Letters 118, 242501, 2017.
[16] Nguyen Tuan Khai, Bui Duy Linh, Do Cong Cuong, Le Xuan Chung, “Particle identification and scattering angle determination in charge-exchange (3He,t) reaction”, Nuclear Science and Technology, No. 1, pp. 8-13, 2013.
[17] T. Kubo et al., “BigRIPS separator and ZeroDegree spectrometer at RIKEN RI Beam Factory”, Prog. Theor. Exp. Phys., 03C003, 2012.
[18] T. Ohnishi et al., “Identification of New Isotopes 125Pd and 126Pd Produced by In-Flight Fission of 345 MeV/nucleon 238U: First Results from the RIKEN RI Beam Factory”, J. Phys. Soc. Jpn 77, 083201, 2008.
[19] T. Ohnishi et al., "Identification of 45 New Neutron-Rich Isotopes Produced by In-Flight Fission of a 238U Beam at 345 MeV/nucleon”, J. Phys. Soc. Jpn 79, 073201, 2010.
[21] H. Kumagai et al.,” Delay-line PPAC for high-energy light ions”, Nuclear Instrum. and Methods Phys. Res., Sect. A 470, 562-570, 2001.
[22] K. Kimura et al., "High-rate particle identification of high-energy heavy ions using a tilted electrode gas ionization chamber", Nuclear Instrum. and Methods Phys. Res., Sect. A 538, 608, 2006.
[23] M. Berz et al., Reconstructive correction of aberrations in nuclear particle spectrographs, Phys. Rev. C 47, 537, 1993.
[24] N. Fukuda et al., "Identification and separation of radioactive isotope beams by the BigRIPS separator at the RIKEN RI Beam Factory", Nucl. Instr. in Phys. Res. B 317, 323, 2013.
[2] L. X. Chung et al., “Elastic proton scattering at intermediate energies as a probe of the 6,8He nuclear matter densities”, Physical Review C 92, 034608, 2015.
[3] S. D. Pain et al., “Structure of 12Be: Intruder d-Wave Strength at N=8”, Phys. Rev. Lett. 96, 032502, 2006.
[4] Le Xuan Chung et al., “The dominance of the ν(0d5/2)2 configuration in the N = 8 shell in 12Be from the breakup reaction on a proton target at intermediate energy”, submitted to Physics Letters B, 2017.
[5] O. Sorlin et al., “Nuclear magic number: New features far from stability”, Progress in Particle and Nuclear Physics 61, Issue 2, 602-673, 2008.
[6] T. Kubo, "In-flight RI beam separator BigRIPS at RIKEN and elsewhere in Japan", Nucl. Instr. Meth. B 204, pp. 97-113, 2003.
[7] A.C. Mueller and R. Anne, "Production of and studies with secondary radioactive ion beams at LISE", Nuclear Instruments and Methods in Physics Research B 56, pp. 559-563, 1991.
[8] D.J. Morrissey et al., "Commissioning the A1900 projectile fragment separator" Nuclear Instruments and Methods in Physics Research B 204, pp. 90-96, 2003.
[9] H. Geissel et al., "The GSI projectile fragment separator (FRS): a versatile magnetic system for relativistic heavy ions", Nuclear Instruments and Methods in Physics Research B 70, pp. 286-297, 1992.
[10] P. Doornenbal and A. Obertelli, “Shell Evolution and Systematic Search for 2+1 Energies”, Proposal for Nuclear Physics Experiment at RI Beam Factory RIBF NP-PAC-13, 2013.
[11] A. Obertelli et al., "MINOS: A vertex tracker coupled to a thick liquid-hydrogen target for in-beam spectroscopy of exotic nuclei", Eur. Jour. Phys. A 50, 8, 2014.
[12] P. Doornenbal, "In-beam gamma-ray spectroscopy at the RIBF", Prog. Theor. Exp. Phys., 03C004, 2012.
[13] C. Santamaria, L. X. Chung et al., "Extension of the N=40 Island of Inversion towards N=50: Spectroscopy of Cr66, Fe70,72", Physical Review Letters 115, 192501, 2015.
[14] P.Nancy et al., L.X.Chung, B.D.Linh., “Are There Signatures of Harmonic Oscillator Shells Far from Stability? First Spectroscopy of 110Zr”, Physical Review Letters, 118, 032501, 2017.
[15] F. Flavigny et al., L.X. Chung, B.D. Linh, “Shape Evolution in Neutron-rich Krypton Isotopes beyond N = 60: First spectroscopy of 98,100Kr”, Physical Review Letters 118, 242501, 2017.
[16] Nguyen Tuan Khai, Bui Duy Linh, Do Cong Cuong, Le Xuan Chung, “Particle identification and scattering angle determination in charge-exchange (3He,t) reaction”, Nuclear Science and Technology, No. 1, pp. 8-13, 2013.
[17] T. Kubo et al., “BigRIPS separator and ZeroDegree spectrometer at RIKEN RI Beam Factory”, Prog. Theor. Exp. Phys., 03C003, 2012.
[18] T. Ohnishi et al., “Identification of New Isotopes 125Pd and 126Pd Produced by In-Flight Fission of 345 MeV/nucleon 238U: First Results from the RIKEN RI Beam Factory”, J. Phys. Soc. Jpn 77, 083201, 2008.
[19] T. Ohnishi et al., "Identification of 45 New Neutron-Rich Isotopes Produced by In-Flight Fission of a 238U Beam at 345 MeV/nucleon”, J. Phys. Soc. Jpn 79, 073201, 2010.
[21] H. Kumagai et al.,” Delay-line PPAC for high-energy light ions”, Nuclear Instrum. and Methods Phys. Res., Sect. A 470, 562-570, 2001.
[22] K. Kimura et al., "High-rate particle identification of high-energy heavy ions using a tilted electrode gas ionization chamber", Nuclear Instrum. and Methods Phys. Res., Sect. A 538, 608, 2006.
[23] M. Berz et al., Reconstructive correction of aberrations in nuclear particle spectrographs, Phys. Rev. C 47, 537, 1993.
[24] N. Fukuda et al., "Identification and separation of radioactive isotope beams by the BigRIPS separator at the RIKEN RI Beam Factory", Nucl. Instr. in Phys. Res. B 317, 323, 2013.