About   |   More   |   Search
ChemLin Logo

Isotopes of Roentgenium

List, data and properties of all known isotopes of Roentgenium.


Content

Roentgenium isotopes

 

Isotope Table: Roentgenium

The two following tables list the most important data and properties of the Roentgenium isotopes. Further information on the individual Roentgenium isotopes is listed on separate pages and can be accessed via the link in column 1.

 

Atomic Properties

Isotope
Nuclide
ENAtomic Mass
[Nuclear Mass]
{Mass Excess}
Spin I
(h/2π)
Parent
123456
Roentgenium-272272111Rg161272.15327(25) u
[272.092388 u]
{142.77009 MeV}
5+, 6+
Roentgenium-273273111Rg162
Roentgenium-274274111Rg163274.15525(23) u
[274.094368 u]
{144.61444 MeV}
278Nh
Roentgenium-275275111Rg164
Roentgenium-276276111Rg165
Roentgenium-277277111Rg166
Roentgenium-278278111Rg167278.16159(42) u
[278.100708 u]
{150.52012 MeV}
282Nh
Roentgenium-279279111Rg168279.16288(45) u
[279.101998 u]
{151.72174 MeV}
283Nh
Roentgenium-280280111Rg169280.16520(57) u
[280.104318 u]
{153.88281 MeV}
284Nh
Roentgenium-281281111Rg170281.16676(83) u
[281.105878 u]
{155.33594 MeV}
Roentgenium-282282111Rg171282.16934(63) u
[282.108458 u]
{157.73919 MeV}
Roentgenium-283283111Rg172283.17054(79) u
[283.109658 u]
{158.85699 MeV}
Roentgenium-284284111Rg173
Roentgenium-285285111Rg174
Roentgenium-286286111Rg175286.178760(490) u
[286.117878 u]
{166.51387 MeV}

 

Radioactive Decay Properties

IsotopeRadioactive DecayExtern
Half-lifeDecay ModeProbabilityEnergy
789101112
Rg-2720.0038 sα → 268Mtca. 100 %11.197(13) MeVAL
Rg-273- unknown -
Rg-2740.012 sα → 270Mtca. 100 %11.478(86) MeVAL
Rg-275- unknown -
Rg-276- unknown -
Rg-277- unknown -
Rg-2780.0042 sα → 274Mt
SF div
ca. 100 %
?
10.846(95) MeV
AL
Rg-2790.09 sα → 275Mtca. 100 %10.530(168) MeVAL
Rg-2804.4 sα → 276Mtca. 100 %10.149(10) MeVAL
Rg-28115 sSF div
α → 277Mt
82 %
18 %

9.9(4) MeV
AL
Rg-282100 sα → 278Mt
SF div
ca. 100 %
?
9.550(104) MeV
AL
Rg-2835.1 minSF div?
Rg-284- unknown -
Rg-285- unknown -
Rg-28611 minα → 282Mt
SF div
ca. 100 %
?
8.630(100) MeV

 

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 Roentgenium 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 Roentgenium 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.

 

Literature Sources and References

Properties of the Roentgenium 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.

Roentgenium: 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.

 


More Chemistry

isotopes

 

 

 

 

Social Media

Facebook

LinkedIn

Twitter

 

 


Last update: 2022-12-12


© 1996 - 2024 ChemLin