Property talk:P817
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decay mode
type of decay that a radioactive isotope undergoes (should be used as a qualifier for "decays to")
type of decay that a radioactive isotope undergoes (should be used as a qualifier for "decays to")
| Description | the type of decay that a radioactive isotope undergoes | ||||||
|---|---|---|---|---|---|---|---|
| Represents | decay mode (Q1048111) | ||||||
| Data type | Item | ||||||
| Template parameter | Infobox isotope: decay_mode1 (2, 3, 4) (Template:Infobox isotope (Q8946766)) | ||||||
| Domain | According to this template:
term
When possible, data should only be stored as statements | ||||||
| Usage notes | should be used as a qualifier for \decays to\" Property:P816" | ||||||
| Example | uranium-235 (Q848497) → alpha decay (Q179856) calcium-48 (Q659024) → double beta minus decay (Q18907407) | ||||||
| Source | physics literature (note: this information should be moved to a property statement; use property source website for the property (P1896)) | ||||||
| Lists | |||||||
| Proposal discussion | Proposal discussion | ||||||
| Current uses |
| ||||||
| Search for values |
[create Create a translatable help page (preferably in English) for this property to be included here]
Scope is as qualifier (Q54828449): the property must be used by specified way only (Help)
Exceptions are possible as rare values may exist. Exceptions can be specified using exception to constraint (P2303). List of violations of this constraint: Database reports/Constraint violations/P817#Scope, SPARQL
Type “isotope (Q25276)”: item must contain property “instance of (P31)” with classes “isotope (Q25276)” or their subclasses (defined using subclass of (P279)). (Help)
Exceptions are possible as rare values may exist. Exceptions can be specified using exception to constraint (P2303). List of violations of this constraint: Database reports/Constraint violations/P817#Type Q25276, SPARQL
Type “chemical element (Q11344)”: item must contain property “subclass of (P279)” with classes “chemical element (Q11344)” or their subclasses (defined using subclass of (P279)). (Help)
Exceptions are possible as rare values may exist. Exceptions can be specified using exception to constraint (P2303). List of violations of this constraint: Database reports/Constraint violations/P817#Type Q11344, SPARQL
Conflicts with “instance of (P31): Wikimedia disambiguation page (Q4167410), Wikimedia category (Q4167836), Wikimedia template (Q11266439), Wikimedia list article (Q13406463)”: this property must not be used with the listed properties and values. (Help)
Exceptions are possible as rare values may exist. Exceptions can be specified using exception to constraint (P2303). List of violations of this constraint: Database reports/Constraint violations/P817#Conflicts with P31, SPARQL
Value type “decay mode (Q1048111)”: This property should use items as value that contain property “instance of (P31)”. On these, the value for instance of (P31) should be an item that uses subclass of (P279) with value decay mode (Q1048111) (or a subclass thereof). (Help)
Exceptions are possible as rare values may exist. Exceptions can be specified using exception to constraint (P2303). List of violations of this constraint: Database reports/Constraint violations/P817#Value type Q1048111, SPARQL
Do not use beta decay (Q306786)...
Decay mode[edit]
Gamma emisions are part of alpha and beta decay and as excited states won't be described by an item, gamma decay won't be a value of this property. Positron decay is one form of beta decay. Chembot (talk) 23:58, 22 August 2013 (UTC)
- We could say that a isotope decays to itself, with the type of decay "gamma" and later we can add the energy that is radiated. --Tobias1984 (talk) 07:37, 23 August 2013 (UTC)
- Example nickel-60 (Q2103496) --Tobias1984 (talk) 07:45, 23 August 2013 (UTC)
- I am not so sure that this information is useful: I am not an expert but I think gamma emmisions are mainly a correction of the final products from a decay. And then it is not really spontaneous: to go from an excited state to an normal state you first need to have a previous step. I really think we have to keep the simplest case of decay modes from a normal state without any external action or particule capture: these particular cases are not decay but nuclear reactions. Snipre (talk) 09:59, 23 August 2013 (UTC)
- I removed the information from nickel-60 (Q2103496) (Diff for reference: http://www.wikidata.org/w/index.php?title=Q2103496&diff=66555440&oldid=7409895) --Tobias1984 (talk) 14:24, 23 August 2013 (UTC)
- I am not so sure that this information is useful: I am not an expert but I think gamma emmisions are mainly a correction of the final products from a decay. And then it is not really spontaneous: to go from an excited state to an normal state you first need to have a previous step. I really think we have to keep the simplest case of decay modes from a normal state without any external action or particule capture: these particular cases are not decay but nuclear reactions. Snipre (talk) 09:59, 23 August 2013 (UTC)
- Example nickel-60 (Q2103496) --Tobias1984 (talk) 07:45, 23 August 2013 (UTC)
Instead of beta decay (Q306786), beta minus decay (Q14646001) or positron emission (Q1357356) should be used. --Tobias1984 (talk) 15:14, 25 August 2013 (UTC)