livermorium
Enable an AI agent to recognise livermorium, assess evidence for its isotope-specific identity and transient state, and determine which observations or research actions that evidence supports.
Bundle → Layer → Finding → Questions Filled
5 bundles · 10 layers · 10 findings · 21 questions
Element and nuclide identity Establishes what qualifies as livermorium and how isotope-level distinctions are represented.
Element recognition
Connects the registry identity to evidence for nuclear charge 116.
Charge-based identification
Record whether Z = 116 is measured, inferred through a decay chain or merely asserted.
- What evidence supports assigning nuclear charge 116 to this candidate? definition
- Which observation or publication establishes the connection between the candidate and vr.tr.livermorium? provenance
Isotope resolution
Distinguishes mass number and proposed nuclear states without creating separate element identities.
Mass and state assignment
Preserve the basis and uncertainty of A and any isomer assignment independently of confidence in the element.
- Which mass number and nuclear state are assigned, and how were they constrained? measurement
- Could another livermorium isotope or nuclear state explain the same evidence? boundary
Production and lineage Connects a livermorium candidate to the process that could have produced it.
Formation route
Records the reaction or parent decay attributed to candidate formation.
Formation consistency
Capture isotope-resolved reactants or parentage and distinguish an intermediate excited nucleus from the attributed residual nucleus.
- Which beam and target isotopes, or which parent nuclide, are linked to this candidate? provenance
- Does the proposed reaction or decay accounting support the assigned livermorium mass and charge? boundary
Experimental attribution
Anchors formation claims to a specific experiment and its recorded conditions.
Run-to-candidate link
Link each candidate to its run, event record and relevant selection conditions without embedding an accelerator model.
- Which run and event identifiers allow the claimed livermorium production to be traced? provenance
- What competing reaction products or contaminants could pass the same event selection? boundary
Decay-chain recognition Assesses whether correlated signals support a livermorium assignment.
Correlated observations
Separates recorded signals from the decay-chain interpretation built from them.
Event-chain evidence
Retain event energies, positions, time intervals and missing or incomplete signals used to associate implantation with decay.
- Which measured energies, positions and time intervals connect the candidate to subsequent events? measurement
- Which chain links were observed directly, and which require an undetected transition? boundary
Assignment strength
Records competing explanations and the strength of support for the selected chain.
Alternative chain assessment
Track random-correlation estimates, alternative nuclides and replication evidence alongside the preferred interpretation.
- What background estimate or statistical analysis supports treating these events as one livermorium decay chain? measurement
- What additional observation would discriminate the preferred assignment from its strongest alternative? action
Lifetime and element transition Represents the transient presence of a livermorium nucleus and the end of its elemental identity.
Survival assessment
Uses isotope-specific lifetime evidence to assess persistence at a stated time.
Time-qualified survival
Keep measured event intervals separate from population half-life estimates and derived survival probabilities.
- Which evaluated half-life, uncertainty and nuclear-state assignment support the survival calculation? provenance
- What elapsed time and decay assumptions determine the estimated probability that the nucleus remains livermorium? measurement
Decay boundary
Marks the transition from livermorium to a daughter or unresolved decay outcome.
Identity after decay
End the livermorium instance when its nuclear charge changes or it undergoes fission, preserving links to subsequent evidence.
- Which decay outcome was observed, and what daughter assignment does it support? measurement
- Should subsequent observations be linked to a daughter model, a fission event or an unresolved outcome? action
Chemical claims and observation feasibility Controls how proposed livermorium properties inform further observations.
Property evidence
Qualifies chemical and physical claims by their empirical or theoretical basis.
Prediction versus observation
Record whether a proposed oxidation state, bonding behaviour, volatility or phase has direct evidence or depends on calculation and analogy.
- Is the claimed livermorium property measured, calculated, extrapolated from group-16 neighbours or unknown? provenance
- Does the evidence concern a nucleus, an ion, a neutral atom, a compound or hypothetical bulk matter? boundary
Feasible next observation
Assesses whether the attributed nucleus and available evidence support a proposed measurement.
Measurement window
Compare observation latency, survival uncertainty and detection efficiency before treating a candidate as experimentally accessible.
- How do transport and acquisition times compare with the assigned isotope's survival distribution? measurement
- Does the expected surviving yield and detection efficiency support this measurement, or only an upper limit? action
- Which claim could the proposed observation establish without assuming unmeasured livermorium chemistry? boundary
Classifiers Filled
- Family
- Thing Registry
- Category
- Physical world and living systems
- Entry kind
- thing
- Plane
- PHY
- Domain
- PHY.MAT
- Other names and narrower kinds
- livermorium-289, livermorium-290, livermorium-291, livermorium-292, livermorium-293
What it is Filled
This model owns the recognition and assessment of livermorium under vr.tr.livermorium in PHY / PHY.MAT, including isotope assignments, production provenance, decay evidence, survival estimates and the distinction between measured and predicted properties.
In scope
- Element identity and isotope-specific attribution of candidate livermorium nuclei
- Production or parent-decay provenance supporting a livermorium assignment
- Correlated detection events, competing assignments and evidential confidence
- Radioactive lifetime, decay transitions and time-dependent survival estimates
- Evidence-qualified chemical properties and feasibility of further observation
Out of scope
- Accelerator, separator and detector design or operational control
- Preparation, procurement and inventory of beam and target materials
- Complete models of neighbouring elements and radioactive daughter products
- Facility radiation protection, authorisation and waste-management procedures
- Standalone models of hypothetical livermorium compounds or bulk materials
Why it exists Filled
Enable an AI agent to recognise livermorium, assess evidence for its isotope-specific identity and transient state, and determine which observations or research actions that evidence supports.
Distinguishing features Filled
- Elemental identity requires nuclear charge Z = 116; a mass number or detector pulse alone cannot establish livermorium. Reference: [RSC livermorium](https://periodic-table.rsc.org/element/116/livermorium).
- An isotope assignment must pair Z = 116 with a supported mass number and any proposed nuclear state; two nuclei with different mass numbers remain instances of the same registered element.
- A candidate alpha transition attributed to livermorium must be compatible with a daughter having Z = 114 and mass number A − 4; the daughter is a different element, not surviving livermorium.
- A production route must support the assignment without defining the element: a published experiment assigned two chains to 290Lv using a titanium-50 beam. Reference: [Livermorium production with titanium-50](https://arxiv.org/abs/2407.16079).
- A periodic-table placement or calculated property cannot establish an observed chemical state; unknown melting point, boiling point and density must remain distinct from measured values. Reference: [RSC livermorium](https://periodic-table.rsc.org/element/116/livermorium).
What robots and AI may and may not do Filled
Must not
- Present predicted chemical or physical properties as measured facts.
- Claim a new isotope or production result that has not been published or confirmed.
- Credit the discovery to the wrong laboratory or team.
Only with a human decision
- Announcing or endorsing a claim of a new isotope or decay chain.
May
- Report livermorium's discovery, isotopes and half-lives from peer-reviewed sources and IUPAC.
- Mark which of its properties are measured and which are only predicted.
Moral aspects Filled
- Superheavy element research depends on careful evidence; overstatement damages trust.
- Discovery credit carries national and scientific prestige.
Who is affected
- Researchers
- Students
- Laboratories
Owners Filled
Steward
Nobody owns the element; IUPAC names it and the producing laboratories hold the experimental records.
Links to other meta-models Filled
parent
- Q104567 - registry parent class
What else AI and robots need to interact with it Filled
Identity and identifiers required Filled
- Vercy registry: vr.tr.livermorium
- Wikidata: Q1304 (https://www.wikidata.org/wiki/Q1304)
Direct properties required Filled
- Element identity: livermorium; Lv; atomic number 116
- Isotope and nuclear-state assignment: Mass number A; neutron number A − 116; ground state, candidate isomer or unresolved state; assignment confidence
- Production lineage: Linked reaction, experimental run or parent-decay event
- Decay-event observables: Energy in MeV; elapsed time in s or ms; detector position; uncertainties and detection limits
- Isotope half-life estimate: s or ms; uncertainty interval; isotope and state; source version
- Decay outcome: Observed or proposed transition to a daughter nuclide, fission outcome or unresolved termination
- Candidate status: Candidate, supported assignment, disputed, rejected or superseded
- Time-qualified persistence: Observed at stated time; survival probability estimated; decay observed; subsequent fate unresolved
- Property evidence class: Measured, inferred from nuclear evidence, theoretically predicted, extrapolated or unknown
- Observation latency: Transport, processing and acquisition durations in s or ms, with uncertainty
Recognition not applicable Not applicable
Not applicable
Livermorium has no established visible bulk appearance, and identification relies on nuclear measurements rather than visual cues.
Capabilities and actions required Filled
- Resolve an element or isotope label to the registered livermorium identity while preserving uncertain assignments.
- Associate a candidate nucleus with its production event and correlated decay chain.
- Compare competing isotope assignments against measured energies, timing, reaction constraints and background evidence.
- Estimate survival to a proposed observation time using a cited isotope-specific decay model.
- Assess whether a proposed measurement has a supported time window and property basis.
- Revise or withdraw an assignment while retaining the evidence and its relationship to earlier interpretations.
Hazards and failure modes required Filled
- Radioactive decay produces ionizing radiation, although the tiny quantities produced do not constitute an ordinary bulk exposure source.
- The associated experimental environment can present radiation hazards requiring institutional controls.
- Misassigned decay events can lead agents to report an unsupported isotope identification.
Standards and interfaces required Filled
- IUPAC recommendations on the naming of new elements, International Union of Pure and Applied Chemistry.
Context of use required Filled
- Livermorium is produced in specialized nuclear research facilities and studied through individual atoms and their radioactive decay.
- Its study supports research into superheavy nuclei and the limits of nuclear stability.
Sources Filled
- Wikidata item Q1304: livermorium - identity and sense of the item
- Wikipedia: Livermorium - general description of the item
Open questions
- Which isotope and isomer assignments are supported by the latest evaluated nuclear data, and which remain tentative?
- Which evaluated half-lives and branching ratios should govern this model, and how should conflicting published estimates be reconciled?
- What direct experimental evidence, if any, establishes livermorium chemical behaviour rather than predicted group-16 trends?
- Which published candidate chains remain ambiguous because of missing events, alternative mass assignments or possible nuclear isomers?
- For each proposed observation, what isotope-specific transport efficiency, surviving yield and measurement latency have actually been demonstrated?
Machine files
Provenance
thing registry research (pass 2) · unreviewed
Built from: models/things/publications/thing-q1304/spec.json