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Level, E (2 + 1 ) , E (4 + 1 ) , and B ( E 2) ↑ Systematics around the “Island of Inversion” Pieter Doornenbal ピ ー タ ー ドルネンバル
Outline Introduction Experimental status of: ● E (2 + 1 ) and E (4 + 1 ) E (2 + 1 ) and E (4 + 1 ) systematics of Ne and Mg isotopes ✦ Systematics B ( E 2) ↑ and δ B ( E 2) ↑ and δ systematics of Ne and Mg isotopes ✦ Odd-Even Na Isotopes Level systematics of odd-even Na isotopes ✦ Overview Summary and Outlook Level, E (2 + 1 ) , E (4 + RIBF Discussion Plus!, April 25 th , 2014 – 3 1 ) , and B ( E 2) ↑ Systematics around the IoI
Outline Introduction Experimental status of: ● E (2 + 1 ) and E (4 + 1 ) E (2 + 1 ) and E (4 + 1 ) systematics of Ne and Mg isotopes ✦ Systematics B ( E 2) ↑ and δ B ( E 2) ↑ and δ systematics of Ne and Mg isotopes ✦ Odd-Even Na Isotopes Level systematics of odd-even Na isotopes ✦ Overview Summary and Outlook Completing the systematics: ● The E (2 + 1 ) of 40 Mg ✦ B ( E 2) ↑ of 32 Ne and 38 Mg ✦ Level, E (2 + 1 ) , E (4 + RIBF Discussion Plus!, April 25 th , 2014 – 3 1 ) , and B ( E 2) ↑ Systematics around the IoI
Introduction Level, E (2 + 1 ) , E (4 + RIBF Discussion Plus!, April 25 th , 2014 – 4 1 ) , and B ( E 2) ↑ Systematics around the IoI
Time Line (1969-2000) First observation of 27-32 Na isotopes R. Klapisch et al. , PRL 23, 652 (1969) ● 1970 1975 1980 1985 1990 1995 2000 2005 Level, E (2 + 1 ) , E (4 + RIBF Discussion Plus!, April 25 th , 2014 – 5 1 ) , and B ( E 2) ↑ Systematics around the IoI
Time Line (1969-2000) First observation of 27-32 Na isotopes R. Klapisch et al. , PRL 23, 652 (1969) ● 1970 ● Mass measurement C. Thibault et al. , PRC 12, 644 (1975) 1975 1980 1985 1990 1995 2000 2005 Level, E (2 + 1 ) , E (4 + RIBF Discussion Plus!, April 25 th , 2014 – 5 1 ) , and B ( E 2) ↑ Systematics around the IoI
Time Line (1969-2000) First observation of 27-32 Na isotopes R. Klapisch et al. , PRL 23, 652 (1969) ● 1970 ● Mass measurement C. Thibault et al. , PRC 12, 644 (1975) ● Explanation of “unusual” masses X. Campi et al. , NPA 251, 193 (1975) 1975 1980 1985 1990 1995 2000 2005 Level, E (2 + 1 ) , E (4 + RIBF Discussion Plus!, April 25 th , 2014 – 5 1 ) , and B ( E 2) ↑ Systematics around the IoI
Time Line (1969-2000) First observation of 27-32 Na isotopes R. Klapisch et al. , PRL 23, 652 (1969) ● 1970 ● Mass measurement C. Thibault et al. , PRC 12, 644 (1975) ● Explanation of “unusual” masses X. Campi et al. , NPA 251, 193 (1975) 1975 Low E (2 + ) in 32 Mg ● C. Dètraz et al. , PRC 19, 164 (1979) 1980 1985 1990 1995 Z=14 (Si) Z=12 (Mg) 3 2000 + ) (MeV) 2 E(2 1 2005 1 0 14 16 18 20 22 Neutron number Level, E (2 + 1 ) , E (4 + RIBF Discussion Plus!, April 25 th , 2014 – 5 1 ) , and B ( E 2) ↑ Systematics around the IoI
Time Line (1969-2000) First observation of 27-32 Na isotopes R. Klapisch et al. , PRL 23, 652 (1969) ● 1970 ● Mass measurement C. Thibault et al. , PRC 12, 644 (1975) ● Explanation of “unusual” masses X. Campi et al. , NPA 251, 193 (1975) 1975 Low E (2 + ) in 32 Mg ● C. Dètraz et al. , PRC 19, 164 (1979) ● “Island of inversion” 1980 B.H. Wildenthal, W. Chung, PRC 22, 2260 (1980) E.K. Warburton, J.A. Becker, B.A. Brown, 1985 PRC 41, 1147 (1990) 1990 1995 Z=14 (Si) Z=12 (Mg) 3 2000 + ) (MeV) 2 E(2 1 2005 1 0 14 16 18 20 22 Neutron number Level, E (2 + 1 ) , E (4 + RIBF Discussion Plus!, April 25 th , 2014 – 5 1 ) , and B ( E 2) ↑ Systematics around the IoI
Time Line (1969-2000) First observation of 27-32 Na isotopes R. Klapisch et al. , PRL 23, 652 (1969) ● 1970 ● Mass measurement C. Thibault et al. , PRC 12, 644 (1975) ● Explanation of “unusual” masses X. Campi et al. , NPA 251, 193 (1975) 1975 Low E (2 + ) in 32 Mg ● 15 C. Dètraz et al. , PRC 19, 164 (1979) B(E2) of N=20 Isotones ● “Island of inversion” 1980 B(E2) (W.u.) 10 B.H. Wildenthal, W. Chung, PRC 22, 2260 (1980) E.K. Warburton, J.A. Becker, B.A. Brown, 1985 PRC 41, 1147 (1990) 5 B ( E 2) ↑ of 32 Mg ● 0 1990 0 2 4 6 8 T. Motobayashi et al. , PLB 346, 9 (1995) 20 - Proton Number 1995 Z=14 (Si) Z=12 (Mg) 3 2000 + ) (MeV) 2 E(2 1 2005 1 0 14 16 18 20 22 Neutron number Level, E (2 + 1 ) , E (4 + RIBF Discussion Plus!, April 25 th , 2014 – 5 1 ) , and B ( E 2) ↑ Systematics around the IoI
E (2 + 1 ) and E (4 + 1 ) Systematics Level, E (2 + 1 ) , E (4 + RIBF Discussion Plus!, April 25 th , 2014 – 6 1 ) , and B ( E 2) ↑ Systematics around the IoI
Status in 2000 from Gamma-ray Spectroscopy 30 Si 31 Si 32 Si 33 Si 34 Si 35 Si 36 Si 37 Si 38 Si Z = 14 Introduction 215(10) 113(33) 84(33) 190(60) 190(70) + + ) ? 3 ( 3 ? ( 7 − ) 2235 2.4 1942 ? 3327 ? 1797 ? 1084 ? E (2 + 1 ) and E (4 + 2 2 2 2 1 ) 5280 (5220) ? ? ? ◦ ◦ ◦ ◦ ◦ ◦ ◦ ◦ ◦ Systematics 29 Al 30 Al 31 Al 32 Al 33 Al 34 Al 35 Al 36 Al 37 Al ❖ Status in 2000 ❖ Spectroscopy at + ? ? 5 ( 3 2 , 5 2 ) + ( ? 2 ) ? ? ? 3 + 1 + ? ? ? ? 2 2 2 RIPS ◦ ◦ ◦ ❖ Status in 2005 28 Mg 29 Mg 30 Mg 31 Mg 32 Mg 33 Mg 34 Mg 35 Mg 36 Mg Z = 12 ❖ ZeroDegree 350(50) 270(16) 413(29) ? ? + ? 3 ( 7 ? ? ? − ) 1473 2.7 1482 ? 885 2.6 ? ? ? ? 2 2 2 ❖ DALI2 4020 2322 ? ? ? ◦ ◦ ◦ • Configuration 27 Na 28 Na 29 Na 30 Na 31 Na 32 Na 33 Na 34 Na 35 Na ❖ E (2 + ) in 32 Ne ❖ 38 Mg 5 + 3 + 3 + ? ? 1 + 2 + ? ? ? ? ? ? 2 2 2 2 2 ◦ ◦ ◦ • ❖ Mg Systematics 26 Ne 27 Ne 28 Ne 29 Ne 30 Ne 31 Ne 32 Ne 33 Ne 34 Ne Z = 10 ❖ Summary 228(41) 270(14) ? ? ? even-even + ) ( ? ? ? ( 3 ? ? 2 ) 2018 ? 1310 ? ? ? ? ? ? ? B ( E 2) ↑ and δ 2 2 2 ? ? ? ? ? B ( E 2 ↑ ) ◦ ◦ ◦ E (4 + 1 ) E (2 + Odd-Even Na 1 ) 25 F 26 F 27 F 28 F 29 F 30 F 31 F 32 F 33 F E (2 + 1 ) Isotopes E (4 + 1 ) ( ? ( ? + ) ? ? ( 5 ? ? ? ) ? ? ? ) ? ? ? ? ? ? 2 2 2 Overview Summary and N = 16 N = 18 N = 20 N = 22 N = 24 Outlook Prediction by E. K. Warburton et al. , Phys. Rev. C 41 , 1147 (1990). 26,28 Ne, 30,32 Mg Coulex: B. Pritychenko et al. , Phys. Lett. B 461 , 322 (1999). 31 Na Coulex: B. Pritychenko et al. , Phys. Rev. C 63 , 011305(R) (2000). Level, E (2 + 1 ) , E (4 + RIBF Discussion Plus!, April 25 th , 2014 – 7 1 ) , and B ( E 2) ↑ Systematics around the IoI
Status in 2000 from Gamma-ray Spectroscopy 30 Si 31 Si 32 Si 33 Si 34 Si 35 Si 36 Si 37 Si 38 Si Z = 14 Introduction 215(10) 113(33) 84(33) 190(60) 190(70) + + ) ? 3 ( 3 ? ( 7 − ) 2235 2.4 1942 ? 3327 ? 1797 ? 1084 ? E (2 + 1 ) and E (4 + 2 2 2 2 1 ) 5280 (5220) ? ? ? ◦ ◦ ◦ ◦ ◦ ◦ ◦ ◦ ◦ Systematics 29 Al 30 Al 31 Al 32 Al 33 Al 34 Al 35 Al 36 Al 37 Al ❖ Status in 2000 ❖ Spectroscopy at + ? ? 5 ( 3 2 , 5 2 ) + ( ? 2 ) ? ? ? 3 + 1 + ? ? ? ? 2 2 2 RIPS ◦ ◦ ◦ ❖ Status in 2005 28 Mg 29 Mg 30 Mg 31 Mg 32 Mg 33 Mg 34 Mg 35 Mg 36 Mg Z = 12 ❖ ZeroDegree 350(50) 270(16) 413(29) ? ? + ? 3 ( 7 ? ? ? − ) 1473 2.7 1482 ? 885 2.6 ? ? ? ? 2 2 2 ❖ DALI2 4020 2322 ? ? ? ◦ ◦ ◦ • Configuration 27 Na 28 Na 29 Na 30 Na 31 Na 32 Na 33 Na 34 Na 35 Na ❖ E (2 + ) in 32 Ne ❖ 38 Mg 5 + 3 + 3 + ? ? 1 + 2 + ? ? ? ? ? ? 2 2 2 2 2 ◦ ◦ ◦ • ❖ Mg Systematics 26 Ne 27 Ne 28 Ne 29 Ne 30 Ne 31 Ne 32 Ne 33 Ne 34 Ne Z = 10 ❖ Summary 228(41) 270(14) ? ? ? even-even + ) ( ? ? ? ( 3 ? ? 2 ) 2018 ? 1310 ? ? ? ? ? ? ? B ( E 2) ↑ and δ 2 2 2 ? ? ? ? ? B ( E 2 ↑ ) ◦ ◦ ◦ E (4 + 1 ) E (2 + Odd-Even Na 1 ) 25 F 26 F 27 F 28 F 29 F 30 F 31 F 32 F 33 F E (2 + 1 ) Isotopes E (4 + 1 ) ( ? ( ? + ) ? ? ( 5 ? ? ? ) ? ? ? ) ? ? ? ? ? ? 2 2 2 Overview Summary and N = 16 N = 18 N = 20 N = 22 N = 24 Outlook Prediction by E. K. Warburton et al. , Phys. Rev. C 41 , 1147 (1990). 26,28 Ne, 30,32 Mg Coulex: B. Pritychenko et al. , Phys. Lett. B 461 , 322 (1999). 31 Na Coulex: B. Pritychenko et al. , Phys. Rev. C 63 , 011305(R) (2000). Level, E (2 + 1 ) , E (4 + RIBF Discussion Plus!, April 25 th , 2014 – 7 1 ) , and B ( E 2) ↑ Systematics around the IoI
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