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List of isotopes

[edit]


Nuclide
[n 1] 		Z N Isotopic mass (Da)[1]
[n 2][n 3] 		Half-life[2]
[n 4] 		Decay
mode[2]
[n 5] 		Daughter
isotope
[n 6][n 7] 		Spin and
parity[2]
[n 8][n 4] 		Isotopic
abundance
Excitation energy[n 4]
135Tb 65 70 134.96452(43)# 1.01(28) ms p 134Gd (7/2−)
139Tb 65 74 138.94833(32)# 1.6(2) s β+ 139Gd 5/2−#
140Tb 65 75 139.94581(86) 2.29(15) s β+ (99.74%) 140Gd (7+)
EC (<3%) 140Gd
β+, p (0.26%) 139Eu
152Tb 65 87 151.924082(43) 17.8784(95) h[3] EC (83%)[3] 152Gd 2−
β+ (17%)[3]
α (<7×10−7%)[4] 148Eu
152m1Tb 342.15(16) keV 960(10) ns IT 152Tb 5−
152m2Tb 501.74(19) keV 4.2(1) min IT (78.9%) 152Tb 8+
β+ (21.1%) 152Gd
153Tb 65 88 152.9234417(42) 2.34(1) d β+ 153Gd 5/2+
153mTb 163.175(5) keV 186(4) μs IT 153Tb 11/2−
159Tb[n 9] 65 94 158.9253537(12) Stable 3/2+ 1.0000
160Tb 65 95 159.9271746(12) 72.3(2) d β− 160Dy 3−
174Tb 65 109 173.96568(54)# 240# ms
[>550 ns] 		2−#
This table header & footer:
  1. ^ mTb – Excited nuclear isomer.
  2. ^ ( ) – Uncertainty (1σ) is given in concise form in parentheses after the corresponding last digits.
  3. ^ # – Atomic mass marked #: value and uncertainty derived not from purely experimental data, but at least partly from trends from the Mass Surface (TMS).
  4. ^ a b c # – Values marked # are not purely derived from experimental data, but at least partly from trends of neighboring nuclides (TNN).
  5. ^ Modes of decay:
    α: Alpha decay
    β+: Positron emission
    EC: Electron capture
    CD: Cluster decay
    IT: Isomeric transition
    n: Neutron emission
    p: Proton emission
  6. ^ Bold italics symbol as daughter – Daughter product is nearly stable.
  7. ^ Bold symbol as daughter – Daughter product is stable.
  8. ^ ( ) spin value – Indicates spin with weak assignment arguments.
  9. ^ Fission product

Format test

[edit]
Nuclide
[n 1] 		Z N Isotopic mass (Da)[1]
[n 2][n 3] 		Half-life[2]
[n 4] 		Decay
mode[2]
[n 5] 		Daughter
isotope
[n 6][n 7] 		Spin and
parity[2]
[n 8][n 4] 		Isotopic
abundance
Excitation energy[n 4]
139Tb 65 74 138.94833(32)# 1.6(2) s β+ 139Gd 5/2-#




140Tb 65 75 138.94833(32)# 1.6(2) s β+ (99.74%) 140Gd (7+)
ε (<3%) 140Gd
β+p (0.26%) 139Eu



159Tb[n 9] 65 94 158.9253537(12) Stable 3/2+ 1.0000
160Tb 65 95 159.9271746(12) 72.3(2) d β− 160Dy 3-




174Tb 65 109 173.96568(54)# 240# ms
[>550 ns] 		2-#




This table header & footer:
  1. ^ mTb – Excited nuclear isomer.
  2. ^ ( ) – Uncertainty (1σ) is given in concise form in parentheses after the corresponding last digits.
  3. ^ # – Atomic mass marked #: value and uncertainty derived not from purely experimental data, but at least partly from trends from the Mass Surface (TMS).
  4. ^ a b c # – Values marked # are not purely derived from experimental data, but at least partly from trends of neighboring nuclides (TNN).
  5. ^ Modes of decay:
    α: Alpha decay
    EC: Electron capture
    CD: Cluster decay
    IT: Isomeric transition


    p: Proton emission
  6. ^ Bold italics symbol as daughter – Daughter product is nearly stable.
  7. ^ Bold symbol as daughter – Daughter product is stable.
  8. ^ ( ) spin value – Indicates spin with weak assignment arguments.
  9. ^ Fission product
  1. ^ a b Wang, Meng; Huang, W.J.; Kondev, F.G.; Audi, G.; Naimi, S. (2021). "The AME 2020 atomic mass evaluation (II). Tables, graphs and references*". Chinese Physics C. 45 (3): 030003. doi:10.1088/1674-1137/abddaf.
  2. ^ a b c d e f Kondev, F. G.; Wang, M.; Huang, W. J.; Naimi, S.; Audi, G. (2021). "The NUBASE2020 evaluation of nuclear properties" (PDF). Chinese Physics C. 45 (3): 030001. doi:10.1088/1674-1137/abddae.
  3. ^ a b c Collins, S.M.; Köster, U.; Robinson, A.P.; Ivanov, P.; Cocolios, T.E.; Russell, B.; Fenwick, A.J.; Bernerd, C.; Stegemann, S.; Johnston, K.; Gerami, A.M.; Chrysalidis, K.; Mohamud, H.; Ramirez, N.; Bhaisare, A.; Mewburn-Crook, J.; Cullen, D.M.; Pietras, B.; Pells, S.; Dockx, K.; Stucki, N.; Regan, P.H. (2023). "Determination of the Terbium-152 half-life from mass-separated samples from CERN-ISOLDE and assessment of the radionuclide purity". Applied Radiation and Isotopes. 202. Elsevier BV: 111044. doi:10.1016/j.apradiso.2023.111044. ISSN 0969-8043. PMID 37797447.
  4. ^ "Adopted Levels for 152Tb". NNDC Chart of Nuclides.
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