Transcript
Table 20.18 from (1978AJ03): Energy levels of 20 Ne a Ex (MeV ± keV)
Jπ; T
Kπ
0
0+ ; 1
0+ 1
τm or Γc.m. (keV)
1.6337 ± 0.3
2+ ; 0
0+ 1
τm = 1.05 ± 0.06 psec |g| = 0.54 ± 0.04
γ
4.2477 ± 1.1
4+ ; 0
0+ 1
τm = 93 ± 9 fsec
γ
4.9679 ± 0.7
2− ; 0
2−
5.6214 ± 1.7
3− ; 0
2−
5.784 ± 2
1− ; 0
0−
6.724 ± 5
0+ ; 0
0+ 2
7.004 ± 3.6
4− ; 0
7.168 ± 5
4.8 ± 0.5 psec
200 ± 50 fsec
Decay
Reactions
stable
2, 3, 4, 6, 7, 8, 9, 12, 14, 19, 20, 22, 26, 27, 29, 30, 31, 34, 40, 41, 42, 43, 47, 48, 49, 50, 51, 54, 55, 56, 59, 62, 66, 67, 68
γ
γ, α
10, 23, 32, 44, 52, 64,
11, 25, 33, 46, 53, 65,
2, 3, 7, 8, 9, 10, 12, 14, 19, 20, 22, 23, 25, 27, 29, 31, 32, 33, 34, 40, 41, 42, 43, 45, 47, 49, 50, 52, 53, 56, 57, 58, 59, 62, 64, 65, 66, 67, 68 2, 3, 7, 8, 9, 14, 19, 20, 22, 23, 24, 25, 27, 29, 31, 32, 33, 40, 41, 42, 43, 49, 50, 52, 53, 56, 59, 62, 64, 65, 66, 67, 68 2, 3, 7, 8, 9, 14, 19, 22, 25, 31, 34, 40, 41, 42, 43, 45, 49, 59, 62, 64 2, 3, 7, 8, 14, 19, 29, 40, 41, 42, 43, 49, 60, 62, 64, 66, 67
γ, α
2, 3, 7, 8, 14, 19, 20, 22, 29, 31, 32, 41, 42, 43, 49, 60, 62, 66, 67
Γ = 15 ± 7 keV
γ, α
3, 7, 8, 14, 15, 19, 31, 40, 41, 43, 47, 49, 63
2−
τm = 440 ± 90 fsec
γ
2, 3, 7, 8, 14, 19, 25, 41, 42, 49, 63
3− ; 0
0−
Γ = 8 keV
α
7.191 ± 3
0+ ; 0
0+ 3
4
γ, α
7.4214 ± 1.0
2+ ; 0
0+ 2
8
γ, α
7.8290 ± 2.0
2+ ; 0
0+ 3
2.4
γ, α
2, 3, 7, 8, 15, 19, 20, 25, 31, 32, 40, 41, 42, 43, 49 3, 7, 14, 15, 22, 40, 42, 47, 49 2, 3, 5, 7, 14, 15, 19, 40, 41, 43, 47, 49, 58, 60 2, 3, 7, 14, 15, 31, 40, 41, 47, 49, 58, 60
≈ 8.3 8.4486 ± 2.3
0+ ; 0 5− ; 0
0+ 4 2−
> 800 0.013 ± 0.004
α γ, α
8.694 ± 6
1− ; 0
(1− 1)
2.5
1
3, 15, 41 2, 3, 6, 7, 14, 15, 19, 25, 41, 49 3, 7, 15, 40, 41, 49
Table 20.18 from (1978AJ03): Energy levels of 20 Ne a (continued) Ex (MeV ± keV)
Jπ; T
Kπ
τm or Γc.m. (keV)
Decay
Reactions
8.7767 ± 2.3
6+ ; 0
0+ 1
0.11 ± 0.02
γ, α
≈ 8.8
2+ ; 0
0+ 4
> 800
α
2, 3, 6, 7, 9, 14, 15, 19, 20, 22, 23, 24, 25, 31, 41, 49 15, 41, 58
8.848 ± 5
1 ;0
(1− 1) + 03
19
α
7, 15, 32, 41, 60
3.2
γ, α
− +
9.030 ± 5
4 ;0
9.115 ± 4 9.318 ± 6
3− ; 0
3.2
α
9.508 ± 12 9.873 ± 4
2+ ; 0 3+ ; 0
29 ± 15
γ, α γ
3, 7, 14, 15, 40, 41, 49, 58 7, 41, 58
9.92 ± 20 9.99 ± 20
(1+ ); 0 4+ ; 0
γ γ, α
3, 31, 41, 60 2, 7, 14, 15, 41
10.261 ± 4
5− ; 0
10.2724 ± 2.0 10.403 ± 5
0+ 2 − 0
τm < 35 fsec Γ = 155 ± 30
2, 3, 6, 7, 14, 15, 31, 41, 49, 60 2, 7, 15, 40, 41, 49 5, 7, 41, 49, 60
145 ± 40
α
2+ ; 1
0.4 ± 0.2
γ, α
3− ; 0
80
α
2, 3, 7, 15, 19, 20, 22, 23, 25, 32 2, 3, 14, 15, 31, 41, 58, 60, 62 7, 15, 32, 41, 60
16 24
α α
3, 7, 15, 19, 41 15, 41, 58
+
10.548 ± 5 10.583 ± 6
4 ;0 2+ ; 0
10.609 ± 6 10.694 ± 6
6− ; 0 4 , 3+ ; 0
2−
τm = 23 ± 7 fsec
γ γ
2, 3, 6, 7 6, 7
4+ ; 0 3−
0+ 4
Γ = 350 45
α α
15, 24 7, 15, 60
10.79 ± 100 10.838
−
10.840 ± 5 10.89 ± 10
2+ ; 0 3+ ; 1
13 τm < 30 fsec
α γ
7, 15, 41, 58 6, 7, 41, 58, 60
10.97
0+ ; 0
Γ = 580
α
15
4 ;0 4+ ; 1
24 ≤ 0.5
α γ, α
6, 7, 10 14, 15, 41, 60
1− ; 0 1+ ; 1
170
α γ
15 34, 47, 58, 60
11.256 ± 8 11.322 ± 7
1− ; 1 2+ ; 0
≤ 0.3 40 ± 10
γ, α α
14, 15 15, 41, 58
11.528 ± 6 11.552 ± 8
3+ , 4− ; 0 (2+ , 0+ )
τm ≤ 30 fsec Γ = 1.0 ± 0.5 keV
γ γ, α
7, 31 14, 15, 31, 40, 41
11.555 ± 6 11.601 ± 10
1+ , 2− , 3+ 2− ; 1
γ
7, 31 31, 60
11.656 11.866 ± 9
(3+ ); 0 2+ ; 0
60
γ α
6, 7 7, 15, 41, 58
11.926 ± 5
4+ ; 0
0.44 ± 0.15
(γ), α
11.015 ± 6 11.073 ± 8 11.23 ± 30 11.23 ± 10
+
2
14, 15, 40
Table 20.18 from (1978AJ03): Energy levels of 20 Ne a (continued) Ex (MeV ± keV)
Jπ; T
Kπ
τm or Γc.m. (keV)
Decay
Reactions
11.949 ± 5
8+ ; 0
0+ 1
0.035 ± 0.010
γ, α
11.962 ± 8
1− ; 0
30 ± 5
α
6, 7, 8, 9, 14, 15, 19, 20, 22, 23, 41 15
12.100 ± 10
2 ;1
60
− +
12.134 ± 10 12.215 ± 5
6 ;0 2+ ; 1
12.24 ± 30 12.254 ± 6
0+ 3
0.13 ± 0.07 < 0.1
(γ), α γ, α
4+ ; 0 3− , 2+
148 ± 20 ≈5
α γ, α
15 14, 40
(12.35 ± 100) 12.39 ± 10
(2+ ) 3 ; (1)
≈ 500 33 ± 4
α γ, α
15 6, 7, 14, 15, 40, 41
12.412 ± 5 12.49 ± 30
(0+ ); 0
≤8
α γ, α
7, 15, 31, 41 14, 41
12.591 ± 10 12.683 ± 15
6+ ; 0 5− ; 0
12.730 ± 10 12.83 ± 30
4+ ; 0
12.919 ± 10 13.010 ± 10
−
0+ 4
6, 7, 8, 14, 19 14, 34, 41, 62
88 ± 10 97
α α
6, 7, 15, 19, 20, 22 15
100 55
α α
6, 7, 15 15, 31, 41
+
60
γ α
7 7, 15
+
6, 7, 15
(4 ; 0)
13.049 ± 10
(4 ; 0)
70
α
13.060 ± 3.5 13.1680 ± 0.6
2 1+ ; (1)
1.0 2.3 ± 0.2
p, α γ, p, α
13.190 ± 10 13.225
(4+ ; 0) 1−
60 95
α p, α
13.225 13.3038 ± 0.7
0+ 1+
95 0.9 ± 0.1
p, α γ, p, α
13.334 ± 6 13.343 ± 6
7− ; 0 4+ ; 0
(8 ± 3) × 10−4 20 ± 5
α α
2− (4+ ; 0)
29 ± 3 110
γ, p, α α
15, 34, 35 15
13.462 ± 20 13.482 ± 1
1− 1+ ; 1
190 5.7 ± 0.7
p, α γ, p, α
37 31, 34, 35, 40
13.519 13.569 ± 15
(1− ) 2+
33 63
p, α p, α
37 7, 31, 35, 37
13.583
2+
≈ 10
p, α
37
13.412 ± 1 (13.42 ± 140)
−
+
2−
37, 40, 41 34, 35, 37, 40, 41 6, 7, 15 37 37 7, 34, 35, 37, 41 6, 7, 8, 15, 31 15, 31
13.64 ± 15 (13.66)
0 ;1 (1− )
22 110
p, α p, α
7, 31, 35, 37, 40 37
13.6729 ± 0.7 13.7 ± 400
2− (3, 7)−
4.5 ± 0.2 320
γ, p, α α
6, 7, 34, 35, 37 15
3
Table 20.18 from (1978AJ03): Energy levels of 20 Ne a (continued) Ex (MeV ± keV)
Jπ; T
τm or Γc.m. (keV)
Decay
(13.73)
(0+ )
≈ 170
p, α
13.733 ± 1.4 13.845 ± 15
1+ (1− )
7.7 ± 0.5 ≈ 190
γ, p, α p, α
13.886 ± 15 13.904
2− 2+
0.8 47
γ, p p, α
6, 7, 8, 31, 34, 35, 40 37
13.904 ± 20 13.946
6+ 0+
≈ 100 ≈ 70
α p, α
15, 19, 20 37
14.017
1−
≈ 70
p, α
37
14.03 14.124 ± 1.2
2+ 2−
≈ 140 4.7 ± 0.7
p, α γ, p, α
37 34, 35, 37
14.144 ± 15 14.148 ± 1.2
2+ 2−
50 11.8 ± 1.0
p, α γ, p, α
7, 15, 37 34, 35, 37
14.195 14.307 ± 10
1+ 6+
14 ± 1 < 100
γ, p
34, 35 6, 7, 19, 20, 24
14.44 ± 20 14.453 ± 1.8
0+
110 33 ± 3
p, α p, α
6, 7, 35, 37 37
(4+ ) 1−
240 140
α p, α
15 7, 35, 37
36 ± 10 110 ± 20
p, α p, α
37 37
≈ 100 ≈ 100
p, α p, α
6, 7, 15, 37 7, 15, 37
α
6, 7
28 285
p, α p, α
37 37
285 380 ± 60
p, α α
37 6, 7, 15, 19, 20, 22, 32
85 55
p, α p, α
37 37
14.6 ± 300 14.60 ± 20
Kπ
14.695 ± 2.6 14.772 ± 3.0 14.812 ± 15 15.034 ± 15
(2+ , 4+ ) (2+ )
15.16 ± 15
6+
15.23 15.27
(1 )
15.30 15.336 ± 15
(0+ ) 7−
−
0
−
15.39 15.47
Reactions 37 34, 35, 37 7, 37
b
15.50 ± 20 15.70 ± 15 15.879 ± 15 (15.97) 16.01 ± 25
(8− )
(2− )
7, 32
+
(6 ) (8+ )
< 250
α α
6, 7, 15 6, 7, 19
100
α p, α
15 31, 37
38
p, α α
6, 7, 15, 37 6, 15
43
p, α
15, 37
+
(6 ) (2+ ; 1)
16.139 ± 15 16.25 16.326 ± 15
4+
4
Table 20.18 from (1978AJ03): Energy levels of 20 Ne a (continued) Ex (MeV ± keV)
Jπ; T
τm or Γc.m. (keV)
Decay
16.434 ± 15
(0, 2, 4)+
34
p, α
15, 37
16.510 ± 10 16.52
(2, 4, 6)+ 7−
23
α α
6, 7, 15 7
16.63 ± 20 16.719 ± 15
7− (1, 3, 7)−
190 ± 40 10
α α
7, 15, 19, 20, 22 15
16.730 ± 3 16.8
0+ ; 2 7−
2.0 ± 0.5
γ, p, α α
16.854 ± 15
5−
10
α
15
16.98 17.162 ± 15
5 , (7 )
100 37
p, α α
37 15
17.30 ± 20 17.38 ± 15
8+ 9−
220 ± 40 < 10
α α
17.542 ± 15 17.55 ± 10
6+ (2+ ; 1)
136 19
α n, p, α
17.752 ± 15 17.91 ± 20
4+ , (0+ ) (0+ )
50
p, α n, p
18.002 ± 15 18.022 ± 15
7− (2+ , 5− , 6+ )
< 10 45
α α
15 15
18.113 ± 15 18.32 ± 20
7− (6+ )
33 240
α α
6, 7, 8, 15 6, 15
18.427 ± 7 18.7 ± 100
2+ ; 2 (6+ , 7− )
9.5 ± 3 600
γ, n, p, α α
19.16 ± 250
(6+ )
200
α
8, 15
19.40 ± 350 19.4 ± 100
6+ 7−
280 400
α
15 19
19.84 ± 350 20.0 ± 100
6+ 7−
280 300
α α
15 15, 19
20.4 ± 180 20.4 ± 100
6+ 7−
360 200
α α
7, 15 7, 15
20.67 ± 40 20.8 ± 100
9− 7− , (6+ )
120
α α
7, 15, 20 19
21.0 ± 100 21.08 ± 30
7− 9−
200 100 ± 50
α α
15 15, 20, 22, 23
21.3 ± 100 21.8 ± 100
7− , 8+ 7− , 8+
300 300
α α
15, 19 15, 19
22.3 ± 100 22.7 ± 250
7− , 8+ 9−
500 500
α α
15, 19 15
9−
225 ± 40
α
15, 20, 22
22.87 ± 40
−
Kπ
−
2
−
5
Reactions
6, 31, 34, 35, 37, 62 7
15, 19, 20, 22 6, 7, 8, 15, 23 15 31, 36, 37 15, 37 31, 36
34, 35, 36, 37, 47 15, 19
Table 20.18 from (1978AJ03): Energy levels of 20 Ne a (continued) Ex (MeV ± keV)
Jπ; T
τm or Γc.m. (keV)
Decay
23.70 ± 30
9− , (8+ )
≤ 200
α
15, 19, 20, 24
24.21 ± 25 25.10 ± 50
8+ 8+
≈ 500 ≤ 200
α α
15, 20 15, 20
25.67 ± 50 27.1 ± 100
(9− )
≈ 500 700
α α
15, 20 15, 19
28 28.1 ± 100
8+ (10+ )
1600 700
α α
15, 28 15, 19
Kπ
a
Reactions
See also Tables 20.19 and 20.20. For other states with Ex > 15.5 MeV see Tables 20.30, 20.31, 20.32, 20.33 and reactions 46 and 47. It is clear that there are many states with low angular momentum and with unnatural parity which have not been located at high Ex . b
6
