γ γ CsI RIBF SAMURAI CsI(Tl),CsI(Na) APD γ
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- まいか いさやま
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1 /02/24
2 γ γ CsI RIBF SAMURAI CsI(Tl),CsI(Na) APD γ
3 i γ γ γ γ CsI(Tl)-A γ CsI(Tl),CsI(Na)
4 ii
5 iii Sn Sn SRC SAMURAI RIBF SAMURAI θ γ θ γ PMT,APD CATANA PMT(R11265U R580),APD CsI PMT APD [11, 12] CsI(Tl) CsI(Na) Cs, 22 Na, 60 Co Cs, 22 Na, 60 Co γ HV CsI(Na)
6 iv 5.6 CsI(Tl)-B CsI(Na)-C CsI(Tl)-A.B CsI(Na)-C,D ESR PMT A,B,C,D,E x, y, z x γ γ γ Na PMT A,B,C,D,E ?? x,y,z A A B C A,B,C
7 v 3.1 CATANA CsI(Tl),CsI(Na),NaI(Tl),BGO PMT(R11265U), PMT(R580), APD(S ) PMT(R11265U,R580) APD (%) CsI(Tl) CsI(Tl)-A,B CsI(Na) CsI(Na)-C,D
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9 (GDR :Giant Dipole Resonance) GDR E x A E x 80 A 1/3 MeV 3 4 MeV [1] (E1) 1 E1 ˆf 1 H A M S S = 1 2 < 0 [ ˆf 1, [H, ˆf 1 ] ] 0 >= 3A 32πM (1.1.1) (sum rule) 100% [2] GDR (E1 ) Sn MeV 25 MeV GDR [3] GDR 5-7 MeV PDR 1970
10 Sn [3] [4] 1.2 (Z) (N) [5] ,132 Sn 130 Sn 1.3 GDR GDR PDR 10 MeV PDR 15 MeV GDR [3] % PDR PDR 130 Sn, 132 Sn 68 Ni 10.1(7) MeV, 9.8(7) MeV, 9.55(17) MeV 68 Ni 0.17(2) fm 2.8(5) % [6, 7]
11 (Z) (N) [5] Sn GDR PDR PDR [3]
12 4 1 PDR γ 2 RIBF PDR 3 γ γ
13 Ca 2015 Ca PDR 48 Ca 54 Ca 2p 3/2 2p 1/2 52 Ca, 54 Ca PDR [8] RI (RIBF) SAMURAI(Superconducting Analyzer for MUlti-particle from RAdioIsotope beams) 70 Zn(345 AMeV) 48,50,52 Ca γ 48,50,52 Ca Ca γ γ SAMURAI NaI(Tl) γ DALI2 20% γ ,50,52 Ca Ca Pb (Z) (E1 ) B(E1)
14 6 2 E x σ coul B(E1) dσ coul de x = 16π3 9ħc N E1(E x ) db(e1) de x (2.2.1) Pb Pb (Z=82) Pb Z C (Z=6) Ca Pb ( ) Ca Ca 51 Ca 52 Ca PDR GDR 1 51 Ca 51 Ca γ 51 Ca m 51Ca, p 51Ca, E 51Ca, m n, p n, E n γ E γ 52 Ca M M = (E 51Ca + E n ) 2 (p 51Ca + p n ) 2 (2.2.2) E rel = M (m 51Ca + m n ) (2.2.3)
15 2.3 7 γ 52 Ca E x E x = S n + E rel + E γ (2.2.4) E x E rel E γ E rel SAMURAI Ca γ E γ γ 2.2 ( ) γ ( ) 52 Ca 51 Ca* 52 Ca* γ 52 Ca 2.3 RI (RIBF) SAMURAI SAMURAI NEBULA(NEutron detection system for Breakup of Unstable nuclei with Large Acceptance) γ RIBF SAMURAI 2.3,2.4 (SRC) SAMURAI SAMURAI 70 Zn(345 AMeV) 2 52 Ca
16 SRC SAMURAI RIBF 1 ( 70 Zn) Be ( 52 Ca) 2 BigRIPS SAMURAI SAMURAI 52 Ca 51 Ca γ 2.4 γ 60% γ γ γ θ E lab γ = E cm γ 1 γ(1 β cos θ) (2.4.1)
17 2.4 γ 9 β = 0.6, E cm γ = 1 MeV θ 2.5 γ 2.5 β = 0.6 E γ cm = 1 MeV θ γ γ γ I cm γ I lab I lab = (1 + β cos θ)2 1 β 2 I cm (2.4.2) β = 0.6, I cm = 1 γ θ β = 0.6 I cm = 1 θ γ θ E lab, I lab γ γ (θ) θ γ θ SAMRAI β E lab E cm
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19 11 3 γ 2015 γ CATANA CAlorimeter for γ-ray Transition in Atomic Nuclei at high isospin Asymmetry γ CATANA 3.1 γ γ NaI(Tl),CsI(Tl) Ge Ge CATANA γ γ 3.1 γ γ γ α β γ [9] γ E γ = ħω E e = ħω I(I: )
20 12 3 γ K σ photon (K) σ phton (K) = { ϕ 0 α 4 Z ζ 7/2 (ζ 1) ϕ 0 α 4 Z 5 ζ 1 e πα+2α2 (1 ln α) (ζ 1) (3.1.1) ϕ, ζ, α ϕ 0 = 8π 3 ( e 2 m e c 2 ) cm 2 (3.1.2) ζ = hν 0 m e c 2 (3.1.3) α = e2 4πħc = (3.1.4) Z 5 L,M σ photon σ photon 5 4 σ phton(k) (3.1.5) E γ γ E γ E e γ ϕ γ θ E γ E γ = 1 + ζ(1 cos θ) 2ζ cos 2 ϕ E e =E γ (1 + ζ) 2 ζ 2 cos 2 ϕ tan ϕ = cot(θ/2) 1 + ζ ζ 1 σ comp (3.1.6) (3.1.7) (3.1.8) Z σ comp = Zϕ 0 (1 2ζ + 5.2ζ ζ 3 ) (3.1.9) γ E γ 2m e c 2 = 1.02 MeV
21 3.1 γ 13 E γ 2m e c 2 m e c 2 E γ 137m e c 2 Z 1/3 σ pair σ pair = ϕz 2 ( 28 9 ) 218 ln 2ζ 27 (3.1.10) Z 2 ϕ ( ) e 2 2 ϕ = m e c 2 /137 = (cm 2 ) (3.1.11) γ γ σ 3 σ = σ photon + σ comp + σ pair (3.1.12) 3.1 γ 3 1 MeV 1 MeV [9] 3.1 γ 3 1 MeV 1 MeV
22 14 3 γ I γ dx di di = N Aσ Idx (3.1.13) A I 0 γ x I(x) γ I(x)/I 0 I(x) = I 0 e N A σ A x (3.1.14) γ γ (Photomultiplier Tube ;PMT) Avalanche Photodioide(APD) 3.2 PMT 3.2 [10] PMT (PMT) 1. (Photo Cathode) 2. 1 δ 2
23 3.1 γ 15 N α = α δ N (3.1.15) PMT [10] APD Avalanche Photodioide(APD) PMT 60 80% APD ( ) 3.3 APD [10] 3.3 ( )PMT,( )APD PMT APD
24 16 3 γ 3.2 γ γ CATANA γ β = 0.6 γ CATANA 200 CsI(Tl) CsI(Na) (5 < θ < 111 ) E γ =1 MeV 56 % SAMURAI γ 20 % 100 kev-10 MeV 100 kev-30 MeV θ 9 ϕ Cs γ (661 kev) 10 % CATANA γ 15 cm 9.5 cm CATANA CsI(Tl) CsI(Na) γ ( 3.1.1, 3.1.9, ) Z γ CsI(Tl) CsI(Na) NaI(Tl) BGO 3.2 [12]
25 3.2 γ CATANA ( ) ( ) 3.1 CATANA γ 3.4 ( ) (cm) (PMT) Avalanche Photodiode(APD) CATANA PMT(R11265U,R580) APD(S ) PMT APD
26 18 3 γ 3.2 CsI(Tl),CsI(Na),NaI(Tl),BGO CsI(Tl) CsI(Na) NaI(Tl) BGO (g/cm 3 ) (cm) (nm) (ns) (NaI(Tl) (%)) Z Z Z [11] 3.3 PMT(R11265U), PMT(R580), APD(S ) PMT(R11265U) PMT(R580) APD(S ) (mm 2 ) ϕ (nm) (%) (V) CsI(Tl) CsI(Na) 3.6 PMT APD CsI(Na) PMT CsI(Tl) PMT [11, 12] ESR
27 3.2 γ ( )PMT(R11265U R580), ( )APD 3.6 CsI PMT APD [11, 12]
28
29 γ CATANA CATANA CsI(Tl),CsI(Na) 2 PMT 2 (R11265U,R580) APD S CsI(Tl),CsI(Na) PMT,APD CATANA γ A:CsI(Tl), CATANA ( 4.1) B:CsI(Tl), mm 3 C:CsI(Na), D:CsI(Na), A,B,C,D
30 CsI(Tl) CsI(Na) CATANA PMT(R11265U, R580) APD(S ) 3M ESR [13] PMT APD splitter 2 shaping-amp ADC ADC PC ADC Cs, 22 Na, 60 Co 22 Na A 4.1 N N 0 T 1/2 t t N = N 0 2 T 1/2 (4.2.1) Cs, 22 Na, 60 Co 137 Cs β 137 Ba 661 kev γ 22 Na β +
31 ( )VETO 4.1 (kev) (Bq) ( ) 137 Cs Na 511, Co 1173, Ne 1275 kev γ β kev γ 2 60 Co kev,1333 kev γ 4.3 ( ) 137 Cs,( ) 22 Na,( ) 60 Co 137 Cs 661 kev, 22 Na 511 kev,1275 kev, 60 Co 1173 kev,1333 kev γ
32
33 CsI(Tl)-A PMT(R11265U) HV=850 V, 2.0 µs 60 Co γ 40 K(1461 kev) γ (µ) (σ) 5.2 γ γ CsI(Tl)-A PMT(R11265U) HV 850 V,2.0 µs 3 5 µ(ch) = p0 + p1 E γ (5.2.1)
34 ( ) 137 Cs(661 kev), ( ) 22 Na(511 kev,1275 kev), ( ) 60 Co(1173 kev,1333 kev), ( ), ( ) 60 Co
35 Egamma χ 2 / ndf / 3 p ± p ± channel 5.2 γ E 1 p1 E(%) = σ(ch) p1 E γ (5.2.2) 5.3 CsI(Tl)-B( ) CsI(Na)-C D( ) PMT APD (HV) (sht) HV HV 5.3 CsI(Tl)-B 137 Cs 661 kev 60 Co 1173 kev 60 Co 1333 kev γ R1165U, R580, APD PMT:2.0 µs, APD:1.0 µs PMT R11265U HV R V APD
36 V HV PMT(R11265U):+850 V,PMT(R580):+1200 V, APD:+390 V resolution(%) Cs661 Co1173 Co1333 resolution(%) Cs661 Co1173 Co HV(V) HV(V) resolution(%) Cs661 Co1173 Co HV(V) 5.3 HV R11265U R580U APD 3 γ
37 HV 5.4 CsI(Tl)-B R1165U, R580, APD HV PMT(R11265U) 850 V,PMT(R580) V, APD +390 V PMT(R580) sht=2.0 µs PMT(R11265U),APD PMT(R11265U),APD sht=2.0 µs sht=2.0 µs resolution(%) Cs661 Co1173 Co1333 resolution(%) Cs661 Co1173 Co shaping-time(us) shaping-time(us) resolution(%) Cs661 Co1173 Co shaping-time(us) 5.4 R11265U R580U APD
38 PMT(R11265U,R580) APD (%) R11265U R580 APD 137 Cs(661keV) Co(1173keV) Co(1333keV) PMT APD PMT APD HV sht= 2.0 µs (%) 5.1 PMT(R11265U) PMT(R580) APD HV +850 V,+1200 V,+390 V 137 Cs APD 60 Co R Cs 0.7 % CATANA A CsI(Tl) CsI(Na) CsI(Tl) CsI(Na) 3.2 NaI(Tl) 45 %,85 % CsI Tl Na CsI(Na) PMT(R11265U) PMT CsI(Tl)-B CsI(Na)-C(1 ) PMT HV +850 V CsI(Na) sht = 2.0 µs CsI(Tl) CsI(Na) 5.6 CsI(Tl)-B, CsI(Na)-C CsI(Tl) sht = 2.0 µs CsI(Tl) CsI(Na)
39 resolution(%) Cs661 Co1173 Co1333 resolution(%) CsI(Tl)-B CsI(Na)-C shaping-time(us) 5.5 CsI(Na) CsI(Tl) Egamma(keV) 5.6 CsI(Tl)-B( ) CsI(Na)-C( ) CsI(Tl),CsI(Na) 5.7 CsI(Tl)-A,B CsI(Tl)-C,D CsI(Tl)-A CsI(Tl)-B CsI(Na)-C CsI(Na)-D PMT(R11265U) HV=+850 V, sht=2.0 µs CsI(Tl) CsI(Na) A D B C CsI(Tl) CsI(Na) 5.2 CsI(Tl)-A,B CsI(Na)-C,D PMT A/B, D/C γ A-B,D-C CsI(Na) PMT CsI(Tl) PMT PMT 5.2 ( ) CsI(Tl) % CsI(Na) %
40 32 5 resolution(%) CsI(Tl)-A CsI(Tl)-B resolution(%) CsI(Na)-C CsI(Na)-D Egamma(keV) Egamma(keV) 5.7 CsI(Tl)A.B CsI(Na)C,D CsI(Tl) CsI(Na) CsI(Tl) CsI(Na)-D PMT PMT (ESR) ( ) PMT R11265U,HV=+850 V, sht =2.0 µs %-0.86 % PMT
41 5.4 CsI(Tl)-A 33 resolution(%) ESR absorber Egamma(keV) 5.8 ESR ( ) ( ) 5.4 CsI(Tl)-A CATANA B,C,D CsI(Tl)-A A CsI(Tl)-A PMT ESR ESR PMT(R11265U) CsI(Tl)-A PMT PMT HV=+850 V, sht = 2.0 µs ( ) ( ) PMT 5.9 k 1,k 2,k 3
42 34 5 Egamma(keV) 1400 first second thrid resolution(%) 14 first second thrid channel Egamma(keV) HV, 1 k 1 1 = k 1 2 = k 1 3 = % PMT 2.3 % PMT CsI(Tl)-A PMT PMT PMT 5.10 PMT ( ) ( ) PMT PMT
43 5.5 γ γ ( 6.0 cm 9.0 cm) A,A ( 3.4 cm 5.2 cm) B,B C(6.0 cm 3.4 cm) D(9.0 cm 5.2 cm) A A E E 5.12 x, y, z 5.11 A,B,C,D,E A A B B 5.12 x, y E z E γ cm 1 cm 2 A γ A γ cm 137 Cs A 1 cm HV=+850 V, sht=2.0 µs 5.15 x = z = 0 cm, y = 25 cm γ (529 ch), (10.44 %) z (PMT ) z = 1 3 cm PMT z =4 cm
44 x A x z cm cm z = 0 1 cm x γ cm 22 Na A 1 1 cm 2 HV=+850 V, sht = 2.0 µs x = 0 cm( ) z =0 8.8 cm x =0.5 cm, 1.0 cm, 1.5 cm, 2.0 cm z=0 cm 1.8 cm 22 Na 511 kev, 1275 kev 2 γ
45 5.5 γ 37 channel resolution(%) z(cm) z(cm) γ ( ) ( ) z γ 5.16,5.17 x = y = 0 cm, z = 15 cm γ, 551 kev 470 ch, % 1275 kev 1124 ch, 7.65 % x x 0 cm, 0.5 cm, 1.0 cm, 1.5 cm, 2.0 cm channel channel x=0 450 x= x= x= x= z(cm) x=0 x=0.5 x=1.0 x=1.5 x= z(cm) γ ( 511 kev, 1275 kev) x x z γ x = 0 z z (PMT ) z = 0 2 cm kev z = 0.3 cm 2.8 cm 0.51 % z =2.8 cm 8.8 cm 5.4 % 1275 kev z =0.3 cm 2.8 cm 0.20 % z = 2.8 cm 8.8 cm 2.2 %
46 38 5 resolution(%) x=0 x=0.5 x=1.0 x=1.5 x=2.0 resolution(%) x=0 x=0.5 x=1.0 x=1.5 x= z(cm) γ ( 511 kev, 1275 kev)x x z z = 0 2 cm γ z(cm) x x PMT PMT z < 2 cm ( x = 0, z = 0.8 cm) ( x = 0, z = 8.8 cm) kev, 1275 kev x = 0, z = 6.0 cm PMT z = 6.0 cm x = 0, z = 6.0 cm 511 kev,1275 kev 1.0 %, 3.6 %
47 5.5 γ 39 count count channel Na ( x = 0, z = 0.3 cm x = 0, z = 8.8cm) 511 kev,1275 kev channel
48
49 CsI(Tl),CsI(Na) CsI(Tl)-A,B CsI(Na)-C,D PMT(R11265U) CsI(Tl),CsI(Na) PMT 6.1,6.2 PMT SBA(Super Bialkali) SBA PMT [11][12] PMT N e N photon η 300nm-700nm 300nm-700nm γ E γ 1 kev CsI(Tl) 54 CsI(Na) 45 N phton = λ (N e η) (6.1.1) N eλ N eλ = λ { 54 E γ kev (CsI(Tl)) 45 E γ kev (CsI(Na)) (6.1.2)
50 [12] 6.2 PMT Super Bialkali( ) PMT [11] N photon E(%) = 1 Nphoton (6.1.3) HV=+850 V, sht = 2.0 µs CsI(Tl)-A % 31 % PMT PMT 5.5 γ
51 ( )CsI(Tl) CsI(Tl)-A,B ( )CsI(Na) CsI(Na)- C,D γ (CsI(Tl)) CsI(Tl)-A CsI(Tl)-B 137 Cs(661keV) Co(1173keV) Co(1331keV) (CsI(Na)) CsI(Na)-C CsI(Na)-D 137 Cs(661keV) Co(1173keV) Co(1331keV) PMT ,6.4 E 100% 90% A,B,C,D,E A A B B x, y E z E
52 A,A 1 B 1 C 1 PMT E θ 0 Ω 0 = 1 2 (1 cos θ 0) (6.2.1) 6.5 z cm z = 5, 7 cm x = 4.0, 4.0 cm z = 9 cm x = 4.0, 3.5, 3.5, 4.0 cm 0 PMT z = 1 cm -1 cm< x <1 cm efficiency z=1 z=3 z=5 z=7 z= x(cm) 6.5 z = 0 z x A,A 1 A,A PMT θ 1A θ 1A
53 x = 0 E P,C,H,θ, d P (x, y, z) E (0,y, z) P P C H θ PC PH R P ϕ A A PMT ϕ A = A C PMT a=45 mm r=19 mm 6.6 A 1 z = 0 x, z( ) PMT θ 1A P, C, H, θ, d E y = 0 A,A y E 5.2 cm, 3.4 cm, 9.3 cm y = 1 z {5.2 ( )} (6.2.2) x, y, z, ϕ A, r CH, P H, P C, θ, R CH = z + (y a) cos ϕ A sin ϕ A (6.2.3) P H = (y + a) sin ϕ A (6.2.4) P C = CH 2 + P H 2 + x 2 (6.2.5) 1 CH θ = sin P C (6.2.6) R = r cos(ϕ A θ) (6.2.7) θ A A 1 PMT e
54 46 6 θ A = tan 1 R P C (6.2.8) e = 1 2 (1 cos θ A) (6.2.9) x x (PMT ) z z = 5 cm x x = 0 cm PMT z z PMT cos θ z = 5 cm efficiency z=1 z=3 z=5 z=7 z= x(cm) 6.7 A 1 z x B,B 1 B,B θ 1B x x = 0 cm z z = 7 cm x x = 0 cm x A,A B,B z A,A C 1 C 1 θ 1C x
55 efficiency z=1 z=3 z=5 z=7 z= x(cm) 6.8 B 1 y = 0 cm z x z x z (PMT ) efficiency z=1 z=3 z=5 z=7 z= x(cm) 6.9 C 1 z = 0 cm z x
56 x = z ( ) x 1 cm z 1 A B C 1 A B A,B 2 efficinecy no reflection on A on B on C SUM efficinecy no reflection on A on B on C SUM z(cm) z(cm) A,B,C 1 x = x 1cm z z z z 1 2
57 γ CATANA 48,50,52 Ca PDR 2015 CATANA Ca γ γ CATANA CATANA CsI(Tl) CsI(Na) PMT(R11265U,R580) APD(S ) 4 3 CATANA γ 7.2 CATANA CsI(Tl) PMT(R11265U) CATANA
58 50 7 CsI(Tl),CsI(Na) CATANA γ γ RIBF
59 51 [1] ( 1988 ) [2] 19 ( 1988 ) [3] P.Adrich et al., Evidence for Pygmy and Giant Dipole Resonances in 130 Sn and 132 Sn Phys.Rev.Lett.95,132501(2005) [4] D. Savran, T. Aumann, A. Zilges, Progress in Particle and Nuclear Physics (2013), doi: /j.ppnp [5] LBNL Isotopes Project Nuclear Structure Systematics Home Page [6] D.M.Rossi et al. Measurement of the Dipole Polarizability of the Unstable Neutron- Rich Nucules 68 Ni,Phys.Rev.Lett.111,242503(2013) [7] O.wieland et al., Search for the Pygmy Dipole Resonance in 68 Ni at 600 MeV/nucleon Phys.Rev.Lett.102,092502(2009) [8] Tsunenori Inakura, Takashi Nakatsukasa, Kazuhiro Yabana Low-energy E1 strength in select nuclei: Possible constraints on the neutron skins and the symmetry energy arxiv: (2013) [9] W.R.Leo Techniques for Nuclear and Particle Physics Experiment Second Revised Edition(Springer-Verlag, 1993) [10] Glenn F. Knoll 3 ( 2001 ) [11] [12] Saint-Gobain [13] 3M [14] J.Bea, A.Gadea,L.M.Garicia-Raffi,J.Rico, B.Rubio, J.L.Tain imulation of light collection in scintillators with rough surfaces (Nuclear Instruments and Method in Physics Research A 350 (1994) )
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