네오디뮴 동위 원소

자연계에 존재하는 네오디뮴동위 원소142Nd, 143Nd, 144Nd, 145Nd, 146Nd, 148Nd, 150Nd이 존재한다.

이들 중 144Nd, 150Nd은 긴 반감기를 가지고 있는 방사성 동위 원소이다.

143Nd은 네오디뮴-사마륨 연대측정에 이용된다.

핵자
Z(p) N(n)  
동위 원소 질량 (u)
 
반감기[n 1] 붕괴
방식[1][n 2]
붕괴 생성
동위 원소[n 3]

스핀
자연계에 존재하는
동위 원소
범위
(몰 분율)
자연계에 존재하는
최대 범위
(몰 분율)
들뜬 에너지
124Nd 60 64 123.95223(64)# 500# ms 0+
125Nd 60 65 124.94888(43)# 600(150) ms 5/2(+#)
126Nd 60 66 125.94322(43)# 1# s [>200 ns] β+ 126Pr 0+
127Nd 60 67 126.94050(43)# 1.8(4) s β+ 127Pr 5/2+#
β+, p (드묾) 126Ce
128Nd 60 68 127.93539(21)# 5# s β+ 128Pr 0+
β+, p (드묾) 127Ce
129Nd 60 69 128.93319(22)# 4.9(2) s β+ 129Pr 5/2+#
β+, p (드묾) 128Ce
130Nd 60 70 129.92851(3) 21(3) s β+ 130Pr 0+
131Nd 60 71 130.92725(3) 33(3) s β+ 131Pr (5/2)(+#)
β+, p (드묾) 130Ce
132Nd 60 72 131.923321(26) 1.56(10) min β+ 132Pr 0+
133Nd 60 73 132.92235(5) 70(10) s β+ 133Pr (7/2+)
133m1Nd 127.97(11) keV ~70 s β+ 133Pr (1/2)+
133m2Nd 176.10(10) keV ~300 ns (9/2-)
134Nd 60 74 133.918790(13) 8.5(15) min β+ 134Pr 0+
134mNd 2293.1(4) keV 410(30) µs (8)-
135Nd 60 75 134.918181(21) 12.4(6) min β+ 135Pr 9/2(-)
135mNd 65.0(2) keV 5.5(5) min β+ 135Pr (1/2+)
136Nd 60 76 135.914976(13) 50.65(33) min β+ 136Pr 0+
137Nd 60 77 136.914567(12) 38.5(15) min β+ 137Pr 1/2+
137mNd 519.43(17) keV 1.60(15) s IT 137Nd (11/2-)
138Nd 60 78 137.911950(13) 5.04(9) h β+ 138Pr 0+
138mNd 3174.9(4) keV 410(50) ns (10+)
139Nd 60 79 138.911978(28) 29.7(5) min β+ 139Pr 3/2+
139m1Nd 231.15(5) keV 5.50(20) h β+ (88.2%) 139Pr 11/2-
IT (11.8%) 139Nd
139m2Nd 2570.9+X keV >=141 ns
140Nd 60 80 139.90955(3) 3.37(2) d ε 140Pr 0+
140mNd 2221.4(1) keV 600(50) µs 7-
141Nd 60 81 140.909610(4) 2.49(3) h β+ 141Pr 3/2+
141mNd 756.51(5) keV 62.0(8) s IT (99.95%) 141Nd 11/2-
β+ (0.05%) 141Pr
142Nd 60 82 141.9077233(25) 안정[n 4] 0+ 0.272(5) 0.2680-0.2730
143Nd[n 5][n 6] 60 83 142.9098143(25) 안정[n 7] 7/2- 0.122(2) 0.1212-0.1232
144Nd[n 5][n 8] 60 84 143.9100873(25) 2.29(16)×1015 a α 140Ce 0+ 0.238(3) 0.2379-0.2397
145Nd[n 5] 60 85 144.9125736(25) 관찰 안정[n 9] 7/2- 0.083(1) 0.0823-0.0835
146Nd[n 5] 60 86 145.9131169(25) 안정[n 10] 0+ 0.172(3) 0.1706-0.1735
147Nd[n 5] 60 87 146.9161004(25) 10.98(1) d β- 147Pm 5/2-
148Nd[n 5] 60 88 147.916893(3) 관찰 안정[n 11] 0+ 0.057(1) 0.0566-0.0578
149Nd[n 5] 60 89 148.920149(3) 1.728(1) h β- 148Pm 5/2-
150Nd[n 5][n 8] 60 90 149.920891(3) 6.7(7)×1018 a β-β- 150Sm 0+ 0.056(2) 0.0553-0.0569
151Nd 60 91 150.923829(3) 12.44(7) min β- 151Pm 3/2+
152Nd 60 92 151.924682(26) 11.4(2) min β- 152Pm 0+
153Nd 60 93 152.927698(29) 31.6(10) s β- 153Pm (3/2)-
154Nd 60 94 153.92948(12) 25.9(2) s β- 154Pm 0+
154m1Nd 480(150)# keV 1.3(5) µs
154m2Nd 1349(10) keV >1 µs (5-)
155Nd 60 95 154.93293(16)# 8.9(2) s β- 155Pm 3/2-#
156Nd 60 96 155.93502(22) 5.49(7) s β- 156Pm 0+
156mNd 1432(5) keV 135 ns 5-
157Nd 60 97 156.93903(21)# 2# s [>300 ns] β- 157Pm 5/2-#
158Nd 60 98 157.94160(43)# 700# ms [>300 ns] β- 158Pm 0+
159Nd 60 99 158.94609(54)# 500# ms β- 159Pm 7/2+#
160Nd 60 100 159.94909(64)# 300# ms β- 160Pm 0+
161Nd 60 101 160.95388(75)# 200# ms β- 161Pm 1/2-#
  1. 안정 동위 원소는 굵은체로 표기, 우주의 나이보다 반감기가 긴 동위 원소의 반감기는 굵은 흘림체로 표기
  2. 약어:
    ε: 전자 포획
    IT: 이성질핵 전이
  3. 안정 동위 원소는 굵은 글씨로 표기
  4. 이론적으로 자발 핵분열을 할 수 있다.
  5. 핵분열 생성물
  6. 사마륨-네오디뮴 연대 측정에 이용
  7. 알파 붕괴를 통해 139Ce으로 붕괴할 수 있다.
  8. 태양계 초창기부터 존재해 왔었던 방사성 핵자
  9. α 붕괴를 통해 141Ce으로 붕괴할 수 있으며 반감기는 7.3×1021 년을 초과할 것으로 예상된다.
  10. 알파 붕괴를 통해 142Ce으로 붕괴할 수 있다.
  11. 이론상으로 알파 붕괴를 통해 144Ce으로 붕괴할 수 있으며 반감기는 3.8×1020 년을 초과할 것으로 예상된다.

각주

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