Isotopes of sulfur

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Sulfur-35
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Isotopes of sulfur (16S)
Main isotopes Decay
abun­dance half-life (t1/2) mode pro­duct
32S 94.8%
stable
33S 0.760% stable
34S 4.37% stable
35S trace 87.37 d
β−
35Cl
36S 0.02% stable
34S abundances vary greatly (between 3.96 and 4.77 percent) in natural samples.
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    • silicon burning
    ).

    Other than 35S, the

    radioactive isotopes of sulfur are all comparatively short-lived. 35S is formed from cosmic ray spallation of 40Ar in the atmosphere. It has a half-life of 87 days. The next longest-lived radioisotope is sulfur-38, with a half-life of 170 minutes. The shortest-lived is 49S, with a half-life shorter than 200 nanoseconds. Heavier radioactive isotopes of sulfur decay to chlorine
    .

    When sulfide minerals are precipitated, isotopic equilibration among solids and liquid may cause small differences in the δ34S values of co-genetic minerals. The differences between minerals can be used to estimate the temperature of equilibration. The δ13C and δ34S of coexisting carbonates and sulfides can be used to determine the pH and oxygen fugacity of the ore-bearing fluid during ore formation.

    In most

    Rocky Mountain
    lakes thought to be dominated by atmospheric sources of sulfate have been found to have different δ34S values from oceans believed to be dominated by watershed sources of sulfate.

    List of isotopes

    Nuclide[3]
    [n 1]     		Z N Isotopic mass (Da)[4]
    [n 2][n 3]     		Half-life
    Decay
    mode
    [n 4]
    		 Daughter
    isotope
    [n 5]
    Spin and
    parity
    [n 6][n 7]
    		 Natural abundance (mole fraction)
    Excitation energy Normal proportion Range of variation
    27S[n 8] 16 11 27.01828(43)# 15.5(15) ms β+ (96.6%) 27P (5/2+)
    β+, p (2.3%) 26Si
    β+, 2p (1.1%) 25Al
    28S 16 12 28.00437(17) 125(10) ms β+ (79.3%) 28P 0+
    β+, p (20.7%) 27Si
    29S 16 13 28.99661(5) 188(4) ms β+ (53.6%) 29P 5/2+#
    β+, p (46.4%) 28Si
    30S 16 14 29.98490677(22) 1.1759(17) s β+ 30P 0+
    31S 16 15 30.97955701(25) 2.5534(18) s β+ 31P 1/2+
    32S[n 9] 16 16 31.9720711744(14) Stable 0+ 0.9499(26) 0.94454-0.95281
    33S 16 17 32.9714589099(15) Stable 3/2+ 0.0075(2) 0.00730-0.00793
    34S 16 18 33.96786701(5) Stable 0+ 0.0425(24) 0.03976-0.04734
    35S 16 19 34.96903232(4) 87.37(4) d β− 35Cl 3/2+ Trace[n 10]
    36S 16 20 35.96708070(20) Stable 0+ 0.0001(1) 0.00013−0.00027
    37S 16 21 36.97112551(21) 5.05(2) min β− 37Cl 7/2−
    38S 16 22 37.971163(8) 170.3(7) min β− 38Cl 0+
    39S 16 23 38.97513(5) 11.5(5) s β− 39Cl (7/2)−
    40S 16 24 39.975483(4) 8.8(22) s β− 40Cl 0+
    41S 16 25 40.979593(4) 1.99(5) s β− (>99.9%) 41Cl 7/2−#
    β−, n (<.1%) 40Cl
    42S 16 26 41.981065(3) 1.016(15) s β− (>96%) 42Cl 0+
    β−, n (<4%) 41Cl
    43S 16 27 42.986908(5) 265(13) ms β− (60%) 43Cl 3/2−#
    β−, n (40%) 42Cl
    43mS 319(5) keV 415.0(26) ns
    IT
    		 43S (7/2−)
    44S 16 28 43.990119(6) 100(1) ms β− (81.7%) 44Cl 0+
    β−, n (18.2%) 43Cl
    44mS 1365.0(8) keV 2.619(26) µs IT 44S 0+
    45S 16 29 44.99572(111) 68(2) ms β−, n (54%) 44Cl 3/2−#
    β− (46%) 45Cl
    46S 16 30 46.00037(54)# 50(8) ms β− 46Cl 0+
    47S 16 31 47.00791(54)# 20# ms
    [>200 ns]     		β− 47Cl 3/2−#
    48S 16 32 48.01370(64)# 10# ms
    [>200 ns]     		β− 48Cl 0+
    49S[5] 16 33 49.02264(72)# β− 49Cl 3/2−#
    This table header & footer:
    1. ^ mS – 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. ^ Modes of decay:
      IT:
      Isomeric transition
      n: Neutron emission
      p: Proton emission
    5. ^ Bold symbol as daughter – Daughter product is stable.
    6. ^ ( ) spin value – Indicates spin with weak assignment arguments.
    7. ^ # – Values marked # are not purely derived from experimental data, but at least partly from trends of neighboring nuclides (TNN).
    8. ^ Has 2 halo protons
    9. ^ Heaviest theoretically stable nuclide with equal numbers of protons and neutrons
    10. ^ Cosmogenic

    • The beams of several radioactive isotopes (such as those of 44S) have been studied theoretically within the framework of the synthesis of superheavy elements, especially those ones in the vicinity of island of stability.[6][7]

    See also

    References

    1. ^ "Standard Atomic Weights: Sulfur". CIAAW. 2009.
    2. ISSN 1365-3075
      .
    3. doi:10.1088/1674-1137/41/3/030001
      .
    4. doi:10.1088/1674-1137/41/3/030003
      .
    5. S2CID 73508148
      .
    6. S2CID 122586703
      .
    7. S2CID 250673444
      .

    External links
    Retrieved from "https://en.wikipedia.org/w/index.php?title=Isotopes_of_sulfur&oldid=1188198537#Sulfur-35"