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| Isotope Nuclide | E | N | Atomic Mass [Nuclear Mass] {Mass Excess} | Spin I (h/2π) | Parent |
|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | 5 | 6 |
| Hassium-263 | 263108Hs | 155 | 263.12848(13) u [263.0692431 u] {119.67835 MeV} | 3/2+ | |
| Hassium-264 | 264108Hs | 156 | 264.12836(3) u [264.0691231 u] {119.56657 MeV} | 0+ | |
| Hassium-265 | 265108Hs | 157 | 265.129792(26) u [265.0705551 u] {120.90047 MeV} | 9/2+ | |
| Hassium-265m | 265m108Hs | 157 | 265.129792(26) u [265.0705551 u] {120.90047 MeV} | 3/2+ | |
| Hassium-266 | 266108Hs | 158 | 266.13005(4) u [266.0708131 u] {121.14079 MeV} | 0+ | |
| Hassium-267 | 267108Hs | 159 | 267.13167(10) u [267.0724331 u] {122.64981 MeV} | 5/2+ | |
| Hassium-267m | 267m108Hs | 159 | 267.13167(10) u [267.0724331 u] {122.64981 MeV} | 9- | |
| Hassium-268 | 268108Hs | 160 | 268.13186(30) u [268.0726231 u] {122.8268 MeV} | 0+ | |
| Hassium-269 | 269108Hs | 161 | 269.13372(13) u [269.0744831 u] {124.55938 MeV} | 9/2+ | |
| Hassium-270 | 270108Hs | 162 | 270.13431(27) u [270.0750731 u] {125.10896 MeV} | 0+ | |
| Hassium-271 | 271108Hs | 163 | 271.13717(32) u [271.0779331 u] {127.77303 MeV} | ||
| Hassium-272 | 272108Hs | 164 | 272.13850(55) u [272.0792631 u] {129.01192 MeV} | 0+ | 276Ds |
| Hassium-273 | 273108Hs | 165 | 273.14159(39) u [273.0823531 u] {131.89024 MeV} | 3/2+ | |
| Hassium-274 | 274108Hs | 166 | |||
| Hassium-275 | 275108Hs | 167 | 275.14667(63) u [275.0874331 u] {136.62222 MeV} | ||
| Hassium-276 | 276108Hs | 168 | |||
| Hassium-277 | 277108Hs | 169 | 277.15190(58) u [277.0926631 u] {141.49394 MeV} | 3/2+ | |
| Hassium-277m | 277m108Hs | 169 | 277.15190(58) u [277.0926631 u] {141.49394 MeV} |
| Isotope | Radioactive Decay | Extern | |||
|---|---|---|---|---|---|
| Half-life | Decay Mode | Probability | Energy | ||
| 7 | 8 | 9 | 10 | 11 | 12 |
| Hs-263 | 0.76 ms | α → 259Sg | ≤ 100 % | 10.73(5) MeV | AL |
| Hs-264 | 0.8 ms | α → 260Sg SF div | ca. 50 % ca. 50 % | 10.591(20) MeV | AL |
| Hs-265 | 2.0 ms | α → 261Sg SF div | ca. 100 % ≤ 1 % | 10.470(15) MeV | AL |
| Hs-265m | 0.75 ms | α → 261Sg SF diverse | ca. 100 % ≤ 1 % | AL | |
| Hs-266 | 2.97 ms | α → 262Sg SF div | 76(9) % 24(9) % | 10.346(16) MeV | AL |
| Hs-267 | 52 ms | α → 263Sg SF div | ≥ 80 % < 20 % | 10.038(13) MeV | AL |
| Hs-267m | 990(90) μs | α → 263Sg | AL | ||
| Hs-268 | 0.4(+18-2) s | α → 264Sg | ca. 100 % | 9.623(16) MeV | AL |
| Hs-269 | 9.7(+97-33) s | α → 265Sg | ca. 100 % | 9.34(16) MeV | AL |
| Hs-270 | 7.6 s | α → 266Sg SF div | > 50 % < 50 % | 9.07(4) MeV | AL |
| Hs-271 | 4 s | α → 267Sg | AL | ||
| Hs-272 | 160 ms | α → 268Sg | 100 % | 9.63 MeV | AL |
| Hs-273 | 0.76(+71-24) s | α → 269Sg | ca. 100 % | 9.70(5) MeV | AL |
| Hs-274 | AL | ||||
| Hs-275 | 0.15(+27-6) s | α → 271Sg | ca. 100 % | 9.44(5) MeV | AL |
| Hs-276 | AL | ||||
| Hs-277 | 3(+15-1) ms | SF | 100 % | AL | |
| Hs-277m | 0.6(+27-3) min | SF | 100 % | AL | |
Notes (related to the columns):
1 - name of the nuclide, isotope.
2 - E: isotope symbol with mass number (superscript; number of nucleons) and Atomic number (subscript; number of protons).
3 - N: number of neutrons.
4 - relative atomic mass of the Hassium isotope (isotopic mass including electrons) and the mass of the atomic nucleus in square brackets (nuclear mass, nuclide mass without electrons), each related to 12C = 12.00000 [2]. In addition, the mass excess is given in MeV.
5 - nuclear spin I, unit: h/2π.
6 - source nuclides: Possible, assumed or actual source nuclides (mother nuclides, parent nuclides). If applicable, the corresponding decay modes can be found in the data for the respective starting nuclide.
7 - isotope notation in short form.
8 - decay: half-live of the Hassium isotope (a = years; ; d = days; h = hours; min = minutes; s = seconds).
9 - decay mode: type of decay into the respective daughter nuclides with n = neutron emission; p = proton emission; α = alpha decay; β- = beta minus decay with electron emission; EC = electron capture; β+ = positron emission; ε = β+ and/or EC; Iso = isomeric transition; CD = cluster decay; SF = spontaneous decay.
10 - decay probability in percent (%).
11 - decay energy; Particle energy related to decay type.
12 - other information and notes: AL = Adopted Levels (link to external data [1]).
Miscellaneous:
()- Numbers in brackets: uncertainty to represent the spread of the reported value.
~ - Theoretical values or systematic trends.
- unlisted-: Nuclides that have already been mentioned in the literature but for some reason can no longer be found in the current nuclide tables because their discovery e.g. has not confirmed.
Properties of the Hassium nucleides
[1] - NuDat: National Nuclear Data Center, Brookhaven National Laboratory, based on ENSDF and the Nuclear Wallet Cards.
[2] - G. Audi et. al.: The NUBASE evaluation of nuclear and decay properties. Nuclear Physics, (2003), DOI 10.1016/j.nuclphysa.2003.11.001.
[3] - Live Chart of Nuclides. Nuclear structure and decay data.
Hassium: NMR properties
[4] - N. J. Stone: Table of nuclear magnetic dipole and electric quadrupole moments. Atomic Data and Nuclear Data Tables, (2005), DOI 10.1016/j.adt.2005.04.001.
[5] - Pekka Pyykkö: Year-2008 nuclear quadrupole moments. Molecular Physics, (2008), DOI 10.1080/00268970802018367.
[6] - Pekka Pyykkö: Year-2017 nuclear quadrupole moments. Molecular Physics, (2018), DOI 10.1080/00268976.2018.1426131.
[7] - N. J. Stone: Table of recommended nuclear magnetic dipole moments. IAEA, (2019).
More sources:
[8] - Isotopic abundances, atomic weights and isotopic masses: see respective keyword.
Last update: 2022-12-19
Perma link: https://www.chemlin.org/chemical-elements/hassium-isotopes.php
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